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>

frontend/src/components/PluginView.tsx

@@ -1,12 +1,4 @@
-import {
-  ButtonItem,
-  Focusable,
-  PanelSection,
-  PanelSectionRow,
-  joinClassNames,
-  scrollClasses,
-  staticClasses,
-} from 'decky-frontend-lib';
+import { ButtonItem, Focusable, PanelSection, PanelSectionRow } from 'decky-frontend-lib';
 import { VFC, useEffect, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { FaEyeSlash } from 'react-icons/fa';
@@ -36,10 +28,7 @@ const PluginView: VFC = () => {
     return (
       <Focusable onCancelButton={closeActivePlugin}>
         <TitleView />
-        <div
-          className={joinClassNames(staticClasses.TabGroupPanel, scrollClasses.ScrollPanel, scrollClasses.ScrollY)}
-          style={{ height: '100%' }}
-        >
+        <div style={{ height: '100%', paddingTop: '16px' }}>
           {(visible || activePlugin.alwaysRender) && activePlugin.content}
         </div>
       </Focusable>
@@ -48,7 +37,11 @@ const PluginView: VFC = () => {
   return (
     <>
       <TitleView />
-      <div className={joinClassNames(staticClasses.TabGroupPanel, scrollClasses.ScrollPanel, scrollClasses.ScrollY)}>
+      <div
+        style={{
+          paddingTop: '16px',
+        }}
+      >
         <PanelSection>
           {pluginList
             .filter((p) => p.content)

frontend/src/components/TitleView.tsx

@@ -10,6 +10,8 @@ const titleStyles: CSSProperties = {
   display: 'flex',
   paddingTop: '3px',
   paddingRight: '16px',
+  position: 'sticky',
+  top: '0px',
 };
 
 const TitleView: VFC = () => {