Replaces subprocess with asyncio.subprocess in some localplatformlinux functions and improves shutdown handling
Co-authored-by: AAGaming <aagaming@riseup.net>

* Work around account switching failing to open the CEF debugger socket

this automates lsof and gdb to force close the socket before steam finishes shutting down (from RegisterForShutdownStart)

* lint

* fix LD_LIBRARY_PATH for gdb

this cleanly reloads the ui, prevents memory leaks, and won't break the toasts

this prevents needless prompts opening up

* 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

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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>