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>

.github/workflows/build-win.yml

@@ -25,13 +25,15 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: "3.11.4"
+
+    - name: Install Poetry
+      uses: snok/install-poetry@v1
+      with:
+        virtualenvs-create: false
         
     - name: Install Python dependencies ⬇️
       working-directory: ./backend
-      run: |
-        python -m pip install --upgrade pip
-        pip install pyinstaller==5.13.0
-        pip install -r requirements.txt
+      run: C:\Users\runneradmin\.local\bin\poetry install --no-interaction
 
     - name: Install JS dependencies ⬇️
       working-directory: ./frontend
@@ -44,16 +46,18 @@ jobs:
       run: pnpm run build
 
     - name: Build Python Backend 🛠️
-      run: pyinstaller --noconfirm --onefile --name "PluginLoader" --add-data "./backend/static;/static" --add-data "./backend/locales;/locales" --add-data "./plugin;/plugin" --hidden-import=logging.handlers --hidden-import=sqlite3 ./backend/main.py
+      working-directory: ./backend
+      run: C:\Users\runneradmin\.local\bin\poetry run pyinstaller pyinstaller.spec
 
     - name: Build Python Backend (noconsole) 🛠️
-      run: pyinstaller --noconfirm --noconsole --onefile --name "PluginLoader_noconsole" --add-data "./backend/static;/static" --add-data "./backend/locales;/locales" --add-data "./plugin;/plugin" --hidden-import=logging.handlers --hidden-import=sqlite3 ./backend/main.py
-        
+      working-directory: ./backend
+      run: $env:DECKY_NOCONSOLE = 1; C:\Users\runneradmin\.local\bin\poetry run pyinstaller pyinstaller.spec
+
     - name: Upload package artifact ⬆️
       uses: actions/upload-artifact@v3
       with:
         name: PluginLoader Win
         path: |
-          ./dist/PluginLoader.exe
-          ./dist/PluginLoader_noconsole.exe
+          ./backend/dist/PluginLoader.exe
+          ./backend/dist/PluginLoader_noconsole.exe