Packaging rework (#531)

* fix: get rid of title view jank on latest beta

* Count the number of installs for each plugin (#557)

* Bump aiohttp from 3.8.4 to 3.8.5 in /backend (#558)

* fix: include Decky version in request for index.js

This avoids the If-Modified-Since logic in aiohttp and ensures Steam doesn't cache old JS,
even if the timestamps are normalized.

* fix: clean up shellcheck warnings in act runner script

* fix: gitignore settings/

* fix: ensure state directories exist when running without the installer

* feat: determine root directory correctly when running from in-tree

* fix: fix typo in CI script

* refactor: build a proper Python package with poetry

* refactor: move decky_plugin under the poetry structure

There's no need to special case it anymore, just treat it like any other Python module.

* sandboxed_plugin: better fix, attempt 2

---------

Co-authored-by: AAGaming <aagaming@riseup.net>
Co-authored-by: Party Wumpus <48649272+PartyWumpus@users.noreply.github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/decky_loader/plugin/method_call_request.py

@@ -0,0 +1,29 @@
+from typing import Any, TypedDict
+from uuid import uuid4
+from asyncio import Event
+
+class SocketResponseDict(TypedDict):
+    id: str
+    success: bool
+    res: Any
+
+class MethodCallResponse:
+    def __init__(self, success: bool, result: Any) -> None:
+        self.success = success
+        self.result = result
+
+class MethodCallRequest:
+    def __init__(self) -> None:
+        self.id = str(uuid4())
+        self.event = Event()
+        self.response: MethodCallResponse
+    
+    def set_result(self, dc: SocketResponseDict):
+        self.response = MethodCallResponse(dc["success"], dc["res"])
+        self.event.set()
+    
+    async def wait_for_result(self):
+        await self.event.wait()
+        if not self.response.success:
+            raise Exception(self.response.result)
+        return self.response.result