Fix KiCad WASM build and runtime errors

Build improvements:
- Change -O0 to -O1 to fix "local count too large" asyncify error
- Add wasm-emscripten-finalize to host (Docker OOMs on large WASM)
- Use -gseparate-dwarf for smaller main binary with debug info
- Build native protoc for code generation
- Add more functions to asyncify removelist

Runtime fixes:
- Add inject-dyncall-shims.sh to fix "dynCall_* is not defined" in Emscripten 4.x
- Update wxwidgets with browserInfo.name fix

New stubs and bindings:
- Add Embind bindings for JavaScript interop
- Add stubs for scripting, API plugin, PCB frame, navlib

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/build-wxuniversal-wasm.sh

@@ -83,7 +83,7 @@ PCRE2_INCLUDE="$BUILD_DIR/3rdparty/pcre/src"
 
 # Configure debug/release flags based on DEBUG_BUILD environment variable
 if [ "${DEBUG_BUILD:-1}" = "1" ]; then
-    WX_DEBUG_FLAGS="-g -O0"
+    WX_DEBUG_FLAGS="-g -O1"
     WX_CONFIGURE_DEBUG="--enable-debug"
     echo "Building wxWidgets in DEBUG mode"
 else