Refactor render graph error handling and resource APIs

- RenderGraph.Compile/Execute now return Error for better failure detection; error handling is propagated throughout compiler and executor.
- Renamed ScheduleReleaseResource to ReleaseResource for clarity; updated all usages.
- ResourceManager now calls ReleaseResource directly on Mesh, Material, and Shader types.
- Camera exposes Actual/Virtual size properties and Render returns Error.
- RenderingContext now uses IResourceManager for mesh/resource ops.
- Replaced custom BinaryWriter with BufferWriter in RenderGraphHasher.
- Improved variable naming, interface signatures, and code formatting.
- Added Error extension for IsSuccess/IsFailure.
- Minor FMOD/native interop and test code cleanups.
- No breaking API changes except for new Error return values on some methods.

src/Editor/Ghost.DSL/ShaderCompiler/DSLShaderCompiler.cs

@@ -1,7 +1,6 @@
 using Ghost.Core;
 using Ghost.Core.Graphics;
 using Ghost.DSL.ShaderParser;
-using System.Runtime.CompilerServices;
 using System.Text;
 
 namespace Ghost.DSL.ShaderCompiler;
@@ -107,7 +106,7 @@ internal static class DSLShaderCompiler
         if (semantics.passes != null)
         {
             descriptor.passes = new PassDescriptor[semantics.passes.Count];
-            for (int i = 0; i < semantics.passes.Count; i++)
+            for (var i = 0; i < semantics.passes.Count; i++)
             {
                 var pass = semantics.passes[i];
                 var localPipeline = MeragePipeline(pass.localPipeline, PipelineState.Default);