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/toml++/impl/yaml_formatter.inl

@@ -0,0 +1,165 @@
+//# This file is a part of toml++ and is subject to the the terms of the MIT license.
+//# Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
+//# See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
+// SPDX-License-Identifier: MIT
+#pragma once
+
+#include "preprocessor.hpp"
+//# {{
+#if !TOML_IMPLEMENTATION
+#error This is an implementation-only header.
+#endif
+//# }}
+#if TOML_ENABLE_FORMATTERS
+
+#include "yaml_formatter.hpp"
+#include "print_to_stream.hpp"
+#include "table.hpp"
+#include "array.hpp"
+#include "header_start.hpp"
+
+TOML_NAMESPACE_START
+{
+	TOML_EXTERNAL_LINKAGE
+	void yaml_formatter::print_yaml_string(const value<std::string>& str)
+	{
+		if (str->empty())
+		{
+			base::print(str);
+			return;
+		}
+
+		bool contains_newline = false;
+		for (auto c = str->c_str(), e = str->c_str() + str->length(); c < e && !contains_newline; c++)
+			contains_newline = *c == '\n';
+
+		if (contains_newline)
+		{
+			print_unformatted("|-"sv);
+
+			increase_indent();
+
+			auto line_end  = str->c_str() - 1u;
+			const auto end = str->c_str() + str->length();
+			while (line_end != end)
+			{
+				auto line_start = line_end + 1u;
+				line_end		= line_start;
+				for (; line_end != end && *line_end != '\n'; line_end++)
+					;
+
+				if TOML_LIKELY(line_start != line_end || line_end != end)
+				{
+					print_newline();
+					print_indent();
+					print_unformatted(std::string_view{ line_start, static_cast<size_t>(line_end - line_start) });
+				}
+			}
+
+			decrease_indent();
+		}
+		else
+			print_string(*str, false, true);
+	}
+
+	TOML_EXTERNAL_LINKAGE
+	void yaml_formatter::print(const toml::table& tbl, bool parent_is_array)
+	{
+		if (tbl.empty())
+		{
+			print_unformatted("{}"sv);
+			return;
+		}
+
+		increase_indent();
+
+		for (auto&& [k, v] : tbl)
+		{
+			if (!parent_is_array)
+			{
+				print_newline();
+				print_indent();
+			}
+			parent_is_array = false;
+
+			print_string(k.str(), false, true);
+			if (terse_kvps())
+				print_unformatted(":"sv);
+			else
+				print_unformatted(": "sv);
+
+			const auto type = v.type();
+			TOML_ASSUME(type != node_type::none);
+			switch (type)
+			{
+				case node_type::table: print(*static_cast<const table*>(&v)); break;
+				case node_type::array: print(*static_cast<const array*>(&v)); break;
+				case node_type::string: print_yaml_string(*static_cast<const value<std::string>*>(&v)); break;
+				default: print_value(v, type);
+			}
+		}
+
+		decrease_indent();
+	}
+
+	TOML_EXTERNAL_LINKAGE
+	void yaml_formatter::print(const toml::array& arr, bool parent_is_array)
+	{
+		if (arr.empty())
+		{
+			print_unformatted("[]"sv);
+			return;
+		}
+
+		increase_indent();
+
+		for (auto&& v : arr)
+		{
+			if (!parent_is_array)
+			{
+				print_newline();
+				print_indent();
+			}
+			parent_is_array = false;
+
+			print_unformatted("- "sv);
+
+			const auto type = v.type();
+			TOML_ASSUME(type != node_type::none);
+			switch (type)
+			{
+				case node_type::table: print(*static_cast<const table*>(&v), true); break;
+				case node_type::array: print(*static_cast<const array*>(&v), true); break;
+				case node_type::string: print_yaml_string(*static_cast<const value<std::string>*>(&v)); break;
+				default: print_value(v, type);
+			}
+		}
+
+		decrease_indent();
+	}
+
+	TOML_EXTERNAL_LINKAGE
+	void yaml_formatter::print()
+	{
+		if (dump_failed_parse_result())
+			return;
+
+		switch (auto source_type = source().type())
+		{
+			case node_type::table:
+				decrease_indent(); // so root kvps and tables have the same indent
+				print(*static_cast<const table*>(&source()));
+				break;
+
+			case node_type::array: print(*static_cast<const array*>(&source())); break;
+
+			case node_type::string: print_yaml_string(*static_cast<const value<std::string>*>(&source())); break;
+
+			default: print_value(source(), source_type);
+		}
+	}
+}
+TOML_NAMESPACE_END;
+
+#include "header_end.hpp"
+#endif // TOML_ENABLE_FORMATTERS