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/common/env.sh

@@ -40,7 +40,7 @@ DEBUG_BUILD="${DEBUG_BUILD:-1}"
 
 if [ "$DEBUG_BUILD" = "1" ]; then
     export BUILD_TYPE="Debug"
-    export DEBUG_CFLAGS="-g -O0"
+    export DEBUG_CFLAGS="-g -O1"
     export DEBUG_LDFLAGS="-g -gsource-map"
 else
     export BUILD_TYPE="Release"