Add some popular addons, move GUT from 3 -> 4, remove unmaintained Box2D (#402)

Added some popular addons
(source https://www.reddit.com/r/godot/comments/1gvr4bu/most_popular_godot_4_asset_library_addons/)
and moved some from 3 -> 4.

Box2D plugin is archived with the dev focusing on Rapier physics plugin instead.

README.md

@@ -200,6 +200,7 @@ See [Vivraan/godot-lang-support](https://github.com/Vivraan/godot-lang-support).
 - [3D Auto Collision Generator](https://github.com/ThGnommy/godot_3d_auto_collision_generator) - Generate collision for multiple 3D objects in one click.
 - [AnimatedShape2D](https://github.com/Goutte/godot-addon-animated-shape-2d) - Animate a CollisionShape2D along with the frames of an AnimatedSprite2D.
 - [Aseprite Wizard](https://github.com/viniciusgerevini/godot-aseprite-wizard) - Plugin for importing animations from Aseprite as SpriteFrames.
+- [Beehave](https://github.com/bitbrain/beehave) - Enables you to create robust NPC AI systems using behavior trees. 
 - [CReverter (Composite Reverter)](https://codeberg.org/svetogam/creverter) - Memento-based undo/redo utility that supports composition.
 - [CSConnector (Contextual Signal/Setup Connector)](https://codeberg.org/svetogam/csconnector) - Provides a clean interface to dynamically find, setup, and connect to descendant nodes through the scene tree.
 - [CSLocator (Contextual Service Locator)](https://codeberg.org/svetogam/cslocator) - Provides a clean interface to register and find objects through the scene tree like localized singletons.
@@ -217,6 +218,7 @@ See [Vivraan/godot-lang-support](https://github.com/Vivraan/godot-lang-support).
 - [Godot Spin Button](https://github.com/yudinikita/godot-spin-button) - Horizontal Selector with extended options.
 - [Godot XR Tools](https://github.com/godotvr/godot-xr-tools) - Basic components for XR development.
 - [GodotSx](https://github.com/TheWalruzz/godot-sx) - Rx-like extensions for Godot's built-in signals.
+- [GUT](https://github.com/bitwes/Gut) - Utility for writing unit tests in GDScript.
 - [HCoroutines](https://github.com/Inspiaaa/HCoroutines) - Powerful C# coroutine library for Godot.
 - [Health, HitBoxes, HurtBoxes, and HitScans](https://github.com/cluttered-code/godot-health-hitbox-hurtbox) - 2D and 3D Components to manage health, damage, and healing.
 - [HTerrain](https://github.com/Zylann/godot_heightmap_plugin) - Heightmap-based terrain. Supports texture painting, colouring, holes, level of detail and grass. *(Godot 3 and 4)*
@@ -231,7 +233,9 @@ See [Vivraan/godot-lang-support](https://github.com/Vivraan/godot-lang-support).
 - [Maaack's Scene Loader](https://github.com/Maaack/Godot-Scene-Loader) - Scene loader that includes a loading screen, progress bar, and error handling.
 - [NobodyWho](https://github.com/nobodywho-ooo/nobodywho) - Local large language models (LLMs) for "AI-powered" NPC dialogue.
 - [Orchestrator](https://github.com/Vahera/godot-orchestrator) - Dialog and visual-scripting subsystem for 2D and 3D games.
+- [Phantom Camera](https://github.com/ramokz/phantom-camera) - Designed to provide and simplify common behaviors for the built-in Camera2D and Camera3D nodes.
 - [PixelPen](https://github.com/pixelpen-dev/pixelpen) - Pixel art drawing and animation: Common drawing tools such as selection, shape creation, mirroring, tiling, and animation features within the Godot editor.
+- [ProtonScatter](https://github.com/HungryProton/scatter) - Automates the positioning of assets in a scene.
 - [QR Code](https://kenyoni-software.github.io/godot-addons/addons/qr_code) - QR Code generation either with the included QRCodeRect node or use the encoding result of the QRCode class.
 - [Quest Manager](https://github.com/Rubonnek/quest-manager) - Minimalistic quest manager able to track quest state at runtime for easier debugging.
 - [Questify](https://github.com/TheWalruzz/godot-questify) - A graph-based quest editor and manager.
@@ -244,6 +248,7 @@ See [Vivraan/godot-lang-support](https://github.com/Vivraan/godot-lang-support).
 - [System Bar Color Changer](https://github.com/syntaxerror247/godot-android-system-bar-color-changer) - An Android plugin that enables you to dynamically change the colors of the status bar and navigation bar, and also supports enabling translucent system bars for a modern, immersive UI experience.
 - [Talo](https://github.com/TaloDev/godot) - A self-hostable game backend for managing players, leaderboards, stats, saving/loading data and more.
 - [TerraBrush](https://github.com/spimort/TerraBrush) - Minimal Terrain heightmap editor that features sculpting, painting textures, LOD, and MultiZones.
+- [Terrain3D](https://github.com/TokisanGames/Terrain3D) - A high performance, editable 3D terrain system.
 - [ThemeGen](https://github.com/Inspiaaa/ThemeGen) - Easily create themes using GDScript code, allowing you to reuse styles, recombine them, and effortlessly reuse and share colours between components.
 - [Virtual Joystick](https://github.com/MarcoFazioRandom/Virtual-Joystick-Godot) - A virtual joystick for touchscreens. Simple to use and with useful options. *(Godot 3 and 4)*
 - [Your Buil](https://codeberg.org/svetogam/yourbuil) - A plugin that makes it as easy as possible to use build data like git commit hashes in your build.
@@ -293,7 +298,6 @@ See [Vivraan/godot-lang-support](https://github.com/Vivraan/godot-lang-support).
 - [GodotTIE](https://github.com/henriquelalves/GodotTIE) - Text Interface Engine to control text output (like in a RPG dialogue). *(Godot 2 and 3)*
 - [Godot-Trail-System](https://github.com/OBKF/Godot-Trail-System) - Advanced 2D/3D trail system.
 - [Godot VirtualJoystick](https://github.com/mcunha-br/Godot_VirtualJoystick) - A simple vitual joystick for mobile devices.
-- [GUT](https://github.com/bitwes/Gut) - Utility for writing unit tests in GDScript.
 - [InGrid](https://github.com/Larpon/ingrid) - Infinite scrolling grid.
 - [Kehom's Godot Addon Pack](https://github.com/Kehom/GodotAddonPack) - A collection of addons for debugging, networking, UI, and more.
 - [Level of Detail (LOD)](https://github.com/Calinou/godot-lod) - Level of detail add-on for meshes, lights and particles. Can improve performance in large scenes.
@@ -350,7 +354,6 @@ See [Vivraan/godot-lang-support](https://github.com/Vivraan/godot-lang-support).
 - [Entity Spell System](https://github.com/Relintai/entity_spell_system) - An entity and spell system for complex (optionally multiplayer) RPGs. *(Godot 3 and 4)*
 - [FMOD GD4](https://github.com/summertimejordi/fmod_gd4) - FMOD Studio API integration.
 - [Godex](https://github.com/GodotECS/godex) - An entity component system library.
-- [godot-box2d](https://github.com/appsinacup/godot-box2d) - A [Box2D](https://github.com/erincatto/box2d) physics server for Godot.
 - [GodotHook](https://github.com/Mestima/GodotHook) - A lite custom event system for Godot Engine. *(Godot 3 and 4)*
 - [godot-jolt](https://github.com/godot-jolt/godot-jolt) - Allows you to use the [Jolt Physics Engine](https://github.com/jrouwe/JoltPhysics).
 - [godot-luaAPI](https://github.com/WeaselGames/godot_luaAPI) - Module for creating sandboxed modding APIs with Lua. *(Godot 3 and 4)*