feat(cli): add single executable with embedded web assets support

Implement support for bundling web assets into CLI single executable binaries.
When built with --with-web-assets, the executable includes the compiled web
application and serves it directly without file system access. A stub generator
creates empty manifests for normal builds to maintain compatibility.

Key changes:
- Add --with-web-assets flag to build-executable.ts with manifest validation
- Generate embeddedAssets.ts manifest from web/dist during build
- Serve embedded assets in web server with fallback to file system
- Add hapi server subcommand to start API + web server
- Include server sources in CLI tsconfig for compilation scope
- Add workspace-level build:single-exe scripts for production builds

server/tsconfig.json

@@ -10,5 +10,5 @@
         }
     },
     "exclude": ["node_modules"],
-    "include": ["src/**/*.ts"]
+    "include": ["src/**/*.ts", "src/**/*.d.ts"]
 }