feat(gateway): integrate OpenClaw as git submodule

- Add OpenClaw as git submodule at ./openclaw/
- Update GatewayManager to start gateway from submodule path
- Support both production (dist) and development (pnpm dev) modes
- Add IPC handler for OpenClaw status check
- Update Setup wizard to check real OpenClaw submodule status
- Configure electron-builder to include submodule in packaged app
- Add npm scripts for submodule management:
  - postinstall: auto-init submodule
  - openclaw:init: initialize and install dependencies
  - openclaw:install: install dependencies only
  - openclaw:build: build OpenClaw
  - openclaw:update: update to latest version

electron-builder.yml

@@ -20,6 +20,22 @@ extraResources:
       - "**/*"
       - "!icons/*.md"
       - "!icons/*.svg"
+  # OpenClaw submodule - include only necessary files for runtime
+  - from: openclaw/
+    to: openclaw/
+    filter:
+      - "openclaw.mjs"
+      - "package.json"
+      - "dist/**/*"
+      - "skills/**/*"
+      - "extensions/**/*"
+      - "scripts/run-node.mjs"
+      - "!**/*.test.ts"
+      - "!**/*.test.js"
+      - "!**/test/**"
+      - "!**/.git"
+      - "!**/.github"
+      - "!**/docs/**"
 
 asar: true
 asarUnpack: