feature: hud (#37)

* build: replace FetchContent with direct includes for glm

* build(deps): replace SOIL2 with stb for image and vorbis decoding

* build: replace FetchContent with direct includes for toml++

* refactor(texture): bump block texture size to 512 and disable items tab

* feat: add hotbar system with ItemStack and RowLayout

* fix(ui): restrict Ctrl key handling to typing mode

* feat(ui): add widget border support and highlight selected hotbar slot

* fix(ui): update borders on scale change and correct Image width

- Added update_border() calls in set_scale() for Button, ChatBox, Image, Label, and TextField.
- Fixed Image::width() to multiply by width instead of height.
- Added early return in Widget::update_border() if border is not supported.

* feat(ui): add border visual feedback on slider drag

* feat(ui): add ItemSlot widget and refactor hotbar to use it

* feat(world_scene): add inventory UI and pause type enum

* feat(ui): add item slot tooltip and make window size static

* fix(ui label): account for background offset in width/height

* refactor(ui): centralize item info label in inventory and add update

* feat(ui): add hotbar interaction in inventory UI

* fix(inventory-ui): correct row creation logic for first item

The loop starting at index 0 created a new row on the first iteration
(i % 10 == 0). Shift the loop to start at 1 and adjust modulus condition
to create rows correctly every 10 items.

* feat(block): add name_key for localized block names

Add `name_key` field to all block TOML definitions, enabling per-block localization. Update `BlockData` struct and `BlockManager` with `local_name()` method that returns a localized string via the translation system. Add corresponding entries to `en_US.json` and `zh_CN.json`. Modify inventory UI to use the localized name when displaying block info, and fix a bug where emptying a hotbar slot did not clear the item locally.

* fix(ui): change inventory item slot color from white to gray

* fix(ui): add missing include for std::array

include/glm/ext/vector_ulp.hpp

@@ -0,0 +1,112 @@
+/// @ref ext_vector_ulp
+/// @file glm/ext/vector_ulp.hpp
+///
+/// @defgroup ext_vector_ulp GLM_EXT_vector_ulp
+/// @ingroup ext
+///
+/// Allow the measurement of the accuracy of a function against a reference
+/// implementation. This extension works on floating-point data and provide results
+/// in ULP.
+///
+/// Include <glm/ext/vector_ulp.hpp> to use the features of this extension.
+///
+/// @see ext_scalar_ulp
+/// @see ext_scalar_relational
+/// @see ext_vector_relational
+
+#pragma once
+
+// Dependencies
+#include "../ext/scalar_ulp.hpp"
+
+#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_EXT_vector_ulp extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup ext_vector_ulp
+	/// @{
+
+	/// Return the next ULP value(s) after the input value(s).
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam T Floating-point
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> nextFloat(vec<L, T, Q> const& x);
+
+	/// Return the value(s) ULP distance after the input value(s).
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam T Floating-point
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> nextFloat(vec<L, T, Q> const& x, int ULPs);
+
+	/// Return the value(s) ULP distance after the input value(s).
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam T Floating-point
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> nextFloat(vec<L, T, Q> const& x, vec<L, int, Q> const& ULPs);
+
+	/// Return the previous ULP value(s) before the input value(s).
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam T Floating-point
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> prevFloat(vec<L, T, Q> const& x);
+
+	/// Return the value(s) ULP distance before the input value(s).
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam T Floating-point
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> prevFloat(vec<L, T, Q> const& x, int ULPs);
+
+	/// Return the value(s) ULP distance before the input value(s).
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam T Floating-point
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> prevFloat(vec<L, T, Q> const& x, vec<L, int, Q> const& ULPs);
+
+	/// Return the distance in the number of ULP between 2 single-precision floating-point scalars.
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, int, Q> floatDistance(vec<L, float, Q> const& x, vec<L, float, Q> const& y);
+
+	/// Return the distance in the number of ULP between 2 double-precision floating-point scalars.
+	///
+	/// @tparam L Integer between 1 and 4 included that qualify the dimension of the vector
+	/// @tparam Q Value from qualifier enum
+	///
+	/// @see ext_scalar_ulp
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, int64, Q> floatDistance(vec<L, double, Q> const& x, vec<L, double, Q> const& y);
+
+	/// @}
+}//namespace glm
+
+#include "vector_ulp.inl"