Add renderdoc_parser: direct-call Python interface for RenderDoc capture analysis

- Convert from MCP protocol layer to direct Python function calls
- 42 functions across 9 modules: session, event, pipeline, resource, data, shader, advanced, performance, diagnostic
- Requires Python 3.6 (renderdoc.pyd is compiled for Python 3.6)
- Fix renderdoc API calls: GetColorBlends, GetStencilFaces, GetViewport(i), GetScissor(i)
- Remove Python 3.10+ type annotations for Python 3.6 compatibility
- Add README.md with full API documentation
- Includes test.py for basic smoke testing

engine/tools/renderdoc_parser/__init__.py

@@ -0,0 +1,56 @@
+"""renderdoc: Direct-call interface for RenderDoc capture analysis.
+
+Usage:
+    from renderdoc import open_capture, get_capture_info, get_draw_call_state
+
+    open_capture("frame.rdc")
+    info = get_capture_info()
+    state = get_draw_call_state(142)
+    print(state)
+"""
+
+from .session import get_session
+from .tools import (
+    open_capture,
+    close_capture,
+    get_capture_info,
+    get_frame_overview,
+    list_actions,
+    get_action,
+    set_event,
+    search_actions,
+    find_draws,
+    get_pipeline_state,
+    get_shader_bindings,
+    get_vertex_inputs,
+    get_draw_call_state,
+    list_textures,
+    list_buffers,
+    list_resources,
+    get_resource_usage,
+    save_texture,
+    get_buffer_data,
+    pick_pixel,
+    get_texture_stats,
+    read_texture_pixels,
+    export_draw_textures,
+    save_render_target,
+    export_mesh,
+    disassemble_shader,
+    get_shader_reflection,
+    get_cbuffer_contents,
+    pixel_history,
+    get_post_vs_data,
+    diff_draw_calls,
+    analyze_render_passes,
+    sample_pixel_region,
+    debug_shader_at_pixel,
+    get_pass_timing,
+    analyze_overdraw,
+    analyze_bandwidth,
+    analyze_state_changes,
+    diagnose_negative_values,
+    diagnose_precision_issues,
+    diagnose_reflection_mismatch,
+    diagnose_mobile_risks,
+)