chore: remove ServiceLink integration

- Drop the ServiceLink submodule, link-serve command, and serve --rpc mode.
- Remove the now-unused httpx dependency and regenerate uv.lock.
- Add a privacy policy for Chrome Web Store publication.
- Refresh extension icons and bump package/extension version to 0.14.2.
- Keep the native TCP serve path as the only remote-control endpoint.

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "browser-cli"
-version = "0.14.1"
+version = "0.14.2"
 description = "Control your real running browser from the terminal or Python SDK"
 requires-python = ">=3.10"
 dependencies = [
@@ -8,7 +8,6 @@ dependencies = [
     "cryptography>=48",
     "rich>=13",
     "msgpack>=1",
-    "httpx>=0.28",
 ]
 
 [project.optional-dependencies]