feat: copy the latest plugin release URL from the panel; release 0.1.2

Advanced shows the installed plugin version and the latest Gitea release.
'최신 플러그인 주소 복사' puts the release zip URL on the clipboard for
Decky's Install Plugin from URL.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

main.py

@@ -8,7 +8,7 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), "py_modules"))
 
 import decky  # noqa: E402
 
-from mudfish_decky import installer, system  # noqa: E402
+from mudfish_decky import installer, selfupdate, system  # noqa: E402
 from mudfish_decky.client import MudfishClient  # noqa: E402
 from mudfish_decky.controller import Controller  # noqa: E402
 from mudfish_decky.relay import LoginRelay  # noqa: E402
@@ -41,6 +41,10 @@ class Plugin:
     async def stop_login(self) -> dict:
         return await asyncio.to_thread(self._get_controller().stop_login)
 
+    async def plugin_release(self) -> dict:
+        latest = await asyncio.to_thread(selfupdate.latest_plugin_release)
+        return {"current": decky.DECKY_PLUGIN_VERSION, "latest": latest}
+
     async def install_mudfish(self) -> dict:
         return await asyncio.to_thread(self._get_controller().install)