Refactor: variant-aware shader/material pipeline overhaul

Major architectural update to graphics/material/shader system:
- Introduced strongly-typed key structs (Key64/Key128) for passes, variants, and pipelines; removed legacy key types.
- Implemented robust hashing and key generation utilities for efficient variant and pipeline lookup/caching.
- Shader compiler now compiles/caches all keyword variants using new key system; includes handled as lists.
- Switched to push constant root signature for per-draw data; updated HLSL and C# codegen accordingly.
- Refactored Material, Shader, and Pass data structures for cache efficiency and variant support.
- Pipeline library and PSO management now use 128-bit keys and variant-specific caching.
- Replaced WorldNode with SceneNode in editor/scene graph; introduced ComponentManager for archetype/query management.
- Migrated math utilities to Misaki.HighPerformance.Mathematics; updated editor controls.
- Updated all HLSL and codegen for new buffer/push constant layouts and macros.
- Misc: project reference cleanup, D3D12 Work Graph support, doc updates, and code modernization.

Ghost.DSL/ShaderCompiler/Parser/KeywordsBlock.cs

@@ -0,0 +1,84 @@
+using Ghost.Core.Graphics;
+
+namespace Ghost.DSL.ShaderCompiler.Parser;
+
+internal class KeywordsBlock : IBlockParser<List<FunctionCallDeclaration>, List<KeywordsGroup>>
+{
+    public static bool ShouldEnter(Token token)
+    {
+        return token.Match(TokenType.Keyword, TokenLexicon.KnownKeywords.KEYWORDS);
+    }
+
+    public static List<FunctionCallDeclaration> Parse(TokenStreamSlice stream)
+    {
+        stream.Expect(TokenType.Keyword);
+        stream.Expect(TokenType.LBrace);
+
+        var keywords = new List<FunctionCallDeclaration>();
+
+        var bodyStream = stream.Slice(stream.Remaining - 1);
+        while (bodyStream.HasMore)
+        {
+            var keywordToken = bodyStream.Expect(TokenType.Identifier);
+            var args = ParseUtility.ParseFunctionArguments(ref bodyStream, TokenType.Identifier);
+            keywords.Add(new FunctionCallDeclaration { name = keywordToken, arguments = args });
+            bodyStream.Expect(TokenType.Semicolon);
+        }
+
+        stream.Expect(TokenType.RBrace);
+
+        return keywords;
+    }
+
+    public static List<KeywordsGroup>? SemanticAnalysis(List<FunctionCallDeclaration>? syntax, List<DSLShaderError> errors)
+    {
+        if (syntax == null)
+        {
+            return null;
+        }
+
+        var keywords = new List<KeywordsGroup>(syntax.Count);
+        foreach (var keyword in syntax)
+        {
+            if (keyword.arguments == null || keyword.arguments.Count == 0)
+            {
+                errors.Add(new DSLShaderError
+                {
+                    message = $"Function '{keyword.name.lexeme}' must have at least one argument.",
+                    line = keyword.name.line,
+                    column = keyword.name.column
+                });
+                continue;
+            }
+
+            var group = new KeywordsGroup();
+            switch (keyword.name.lexeme)
+            {
+                case TokenLexicon.KnownFunctions.LOCAL:
+                    group.space = KeywordSpace.Local;
+                    break;
+                case TokenLexicon.KnownFunctions.GLOBAL:
+                    group.space = KeywordSpace.Global;
+                    break;
+                default:
+                    errors.Add(new DSLShaderError
+                    {
+                        message = $"Unknown function name '{keyword.name.lexeme}'.",
+                        line = keyword.name.line,
+                        column = keyword.name.column
+                    });
+                    continue;
+            }
+
+            foreach (var arg in keyword.arguments)
+            {
+                group.keywords ??= new List<string>(keyword.arguments.Count);
+                group.keywords.Add(arg.lexeme);
+            }
+
+            keywords.Add(group);
+        }
+
+        return keywords;
+    }
+}