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/gtx/rotate_vector.inl

@@ -0,0 +1,187 @@
+/// @ref gtx_rotate_vector
+
+namespace glm
+{
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<3, T, Q> slerp
+	(
+		vec<3, T, Q> const& x,
+		vec<3, T, Q> const& y,
+		T const& a
+	)
+	{
+		// get cosine of angle between vectors (-1 -> 1)
+		T CosAlpha = dot(x, y);
+		// get angle (0 -> pi)
+		T Alpha = acos(CosAlpha);
+		// get sine of angle between vectors (0 -> 1)
+		T SinAlpha = sin(Alpha);
+		// this breaks down when SinAlpha = 0, i.e. Alpha = 0 or pi
+		T t1 = sin((static_cast<T>(1) - a) * Alpha) / SinAlpha;
+		T t2 = sin(a * Alpha) / SinAlpha;
+
+		// interpolate src vectors
+		return x * t1 + y * t2;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<2, T, Q> rotate
+	(
+		vec<2, T, Q> const& v,
+		T const& angle
+	)
+	{
+		vec<2, T, Q> Result;
+		T const Cos(cos(angle));
+		T const Sin(sin(angle));
+
+		Result.x = v.x * Cos - v.y * Sin;
+		Result.y = v.x * Sin + v.y * Cos;
+		return Result;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<3, T, Q> rotate
+	(
+		vec<3, T, Q> const& v,
+		T const& angle,
+		vec<3, T, Q> const& normal
+	)
+	{
+		return mat<3, 3, T, Q>(glm::rotate(angle, normal)) * v;
+	}
+	/*
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<3, T, Q> rotateGTX(
+		const vec<3, T, Q>& x,
+		T angle,
+		const vec<3, T, Q>& normal)
+	{
+		const T Cos = cos(radians(angle));
+		const T Sin = sin(radians(angle));
+		return x * Cos + ((x * normal) * (T(1) - Cos)) * normal + cross(x, normal) * Sin;
+	}
+	*/
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<4, T, Q> rotate
+	(
+		vec<4, T, Q> const& v,
+		T const& angle,
+		vec<3, T, Q> const& normal
+	)
+	{
+		return rotate(angle, normal) * v;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<3, T, Q> rotateX
+	(
+		vec<3, T, Q> const& v,
+		T const& angle
+	)
+	{
+		vec<3, T, Q> Result(v);
+		T const Cos(cos(angle));
+		T const Sin(sin(angle));
+
+		Result.y = v.y * Cos - v.z * Sin;
+		Result.z = v.y * Sin + v.z * Cos;
+		return Result;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<3, T, Q> rotateY
+	(
+		vec<3, T, Q> const& v,
+		T const& angle
+	)
+	{
+		vec<3, T, Q> Result = v;
+		T const Cos(cos(angle));
+		T const Sin(sin(angle));
+
+		Result.x =  v.x * Cos + v.z * Sin;
+		Result.z = -v.x * Sin + v.z * Cos;
+		return Result;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<3, T, Q> rotateZ
+	(
+		vec<3, T, Q> const& v,
+		T const& angle
+	)
+	{
+		vec<3, T, Q> Result = v;
+		T const Cos(cos(angle));
+		T const Sin(sin(angle));
+
+		Result.x = v.x * Cos - v.y * Sin;
+		Result.y = v.x * Sin + v.y * Cos;
+		return Result;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<4, T, Q> rotateX
+	(
+		vec<4, T, Q> const& v,
+		T const& angle
+	)
+	{
+		vec<4, T, Q> Result = v;
+		T const Cos(cos(angle));
+		T const Sin(sin(angle));
+
+		Result.y = v.y * Cos - v.z * Sin;
+		Result.z = v.y * Sin + v.z * Cos;
+		return Result;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<4, T, Q> rotateY
+	(
+		vec<4, T, Q> const& v,
+		T const& angle
+	)
+	{
+		vec<4, T, Q> Result = v;
+		T const Cos(cos(angle));
+		T const Sin(sin(angle));
+
+		Result.x =  v.x * Cos + v.z * Sin;
+		Result.z = -v.x * Sin + v.z * Cos;
+		return Result;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<4, T, Q> rotateZ
+	(
+		vec<4, T, Q> const& v,
+		T const& angle
+	)
+	{
+		vec<4, T, Q> Result = v;
+		T const Cos(cos(angle));
+		T const Sin(sin(angle));
+
+		Result.x = v.x * Cos - v.y * Sin;
+		Result.y = v.x * Sin + v.y * Cos;
+		return Result;
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER mat<4, 4, T, Q> orientation
+	(
+		vec<3, T, Q> const& Normal,
+		vec<3, T, Q> const& Up
+	)
+	{
+		if(all(equal(Normal, Up, epsilon<T>())))
+			return mat<4, 4, T, Q>(static_cast<T>(1));
+
+		vec<3, T, Q> RotationAxis = cross(Up, Normal);
+		T Angle = acos(dot(Normal, Up));
+
+		return rotate(Angle, RotationAxis);
+	}
+}//namespace glm