refactor(shader): rewrite editor shader compilation bridge with keyword resolution

- Add AssetCatalog.EnumerateByTypes for filtered SQL queries
- Thread LocalKeywordSet through IShaderCompilationBridge API so the
  bridge can resolve keyword bitmask to string defines at compile time
- Eager/lazy popluation of shader-id-to-asset-id map eliminating
  full catalog scan per compilation miss
- Build keyword mapping from PassDescriptor groups to reconstruct
  localIndex -> keywordName in the bridge
- Use CompileShaderPass extension for multi-stage AS/MS/PS compilation
  with correct ShaderModel from descriptor
- Remove double-load of shader asset in compilation flow
- Update test mock to match new interface signature

src/Test/Ghost.UnitTest/Graphics/ShaderLibraryTest.cs

@@ -30,12 +30,12 @@ public class ShaderLibraryTest
 
     private class MockShaderCompilationBridge : IShaderCompilationBridge
     {
-        public List<(ulong id, int passIndex, Key64<ShaderVariant> variantKey)> Requests { get; } = new();
+        public List<(ulong id, int passIndex, Key64<ShaderVariant> variantKey, LocalKeywordSet keywordMask)> Requests { get; } = new();
         public event Action<Key64<ShaderVariant>, ulong>? OnShaderVariantCompiled;
 
-        public void RequestCompilation(ulong shaderId, int passIndex, Key64<ShaderVariant> variantKey)
+        public void RequestCompilation(ulong shaderId, int passIndex, Key64<ShaderVariant> variantKey, LocalKeywordSet keywordMask)
         {
-            Requests.Add((shaderId, passIndex, variantKey));
+            Requests.Add((shaderId, passIndex, variantKey, keywordMask));
         }
 
         public void TriggerCompiled(Key64<ShaderVariant> variantKey, ulong newHash)