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>

wasm/stubs/wasm-emscripten-finalize-stub.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+# Stub wasm-emscripten-finalize that just copies input to output
+# The real finalize runs on the host where more RAM is available
+
+# Handle --version query
+if [[ "$1" == "--version" ]]; then
+    echo "wasm-emscripten-finalize version 121"
+    exit 0
+fi
+
+# Parse arguments to find input/output files
+# wasm-emscripten-finalize <input.wasm> -o <output.wasm> [options]
+INPUT=""
+OUTPUT=""
+PREV_ARG=""
+
+for arg in "$@"; do
+    if [ "$PREV_ARG" = "-o" ]; then
+        OUTPUT="$arg"
+    elif [[ "$arg" != -* ]] && [[ "$arg" == *.wasm ]]; then
+        INPUT="$arg"
+    fi
+    PREV_ARG="$arg"
+done
+
+# Copy input to output (no transformation)
+if [ -n "$INPUT" ] && [ -n "$OUTPUT" ]; then
+    cp "$INPUT" "$OUTPUT"
+elif [ -n "$INPUT" ]; then
+    # In-place mode: nothing to do
+    :
+fi
+
+exit 0