Add deprecation warnings for `strconv.append_*`

core/math/fixed/fixed.odin

@@ -294,3 +294,8 @@ _power_of_two_table := [129]string{
 	"85070591730234615865843651857942052864",
 	"170141183460469231731687303715884105728",
 }
+
+@(deprecated="Use write instead")
+append :: proc(dst: []byte, x: $T/Fixed($Backing, $Fraction_Width)) -> string {
+	return write(dst, x)
+}

core/strconv/deprecated.odin

@@ -0,0 +1,38 @@
+package strconv
+
+// (2025-06-05) These procedures are to be removed at a later release.
+
+@(deprecated="Use write_bits instead")
+append_bits :: proc(buf: []byte, x: u64, base: int, is_signed: bool, bit_size: int, digits: string, flags: Int_Flags) -> string {
+	return write_bits(buf, x, base, is_signed, bit_size, digits, flags)
+}
+
+@(deprecated="Use write_bits_128 instead")
+append_bits_128 :: proc(buf: []byte, x: u128, base: int, is_signed: bool, bit_size: int, digits: string, flags: Int_Flags) -> string {
+	return write_bits_128(buf, x, base, is_signed, bit_size, digits, flags)
+}
+
+@(deprecated="Use write_bool instead")
+append_bool :: proc(buf: []byte, b: bool) -> string {
+	return write_bool(buf, b)
+}
+
+@(deprecated="Use write_uint instead")
+append_uint :: proc(buf: []byte, u: u64, base: int) -> string {
+	return write_uint(buf, u, base)
+}
+
+@(deprecated="Use write_int instead")
+append_int :: proc(buf: []byte, i: i64, base: int) -> string {
+	return write_int(buf, i, base)
+}
+
+@(deprecated="Use write_u128 instead")
+append_u128 :: proc(buf: []byte, u: u128, base: int) -> string {
+	return write_u128(buf, u, base)
+}
+
+@(deprecated="Use write_float instead")
+append_float :: proc(buf: []byte, f: f64, fmt: byte, prec, bit_size: int) -> string {
+	return write_float(buf, f, fmt, prec, bit_size)
+}