feature/hls: Add HLS playback support, and refactors documentation for better usability and maintainability. (#1)

## Overview
This PR introduces HLS playback support, improves the player experience, and refactors documentation for better usability and maintainability.

## Key Features

### HLS Playback Support
- Add HLS integration via new JavaScript assets:
  - `hls.min.js`
  - `plyr.hls.start.js`
  - `watch.hls.js`
- Separate DASH and HLS logic:
  - `plyr-start.js` → `plyr.dash.start.js`
  - `watch.js` → `watch.dash.js`
- Update templates (`embed.html`, `watch.html`) for conditional player loading

### Native Storyboard Preview
- Add `native_player_storyboard` setting in `settings.py`
- Implement hover thumbnail preview for native player modes
- Add `storyboard-preview.js`

### UI and Player Adjustments
- Update templates and styles (`custom_plyr.css`)
- Modify backend modules to support new player modes:
  - `watch.py`, `channel.py`, `util.py`, and related components

### Internationalization
- Update translation files:
  - `messages.po`
  - `messages.pot`

### Testing and CI
- Add and update tests:
  - `test_shorts.py`
  - `test_util.py`
- Minor CI and release script improvements

## Documentation

### OpenRC Service Guide Rewrite
- Restructure `docs/basic-script-openrc/README.md` into:
  - Prerequisites
  - Installation
  - Service Management
  - Verification
  - Troubleshooting
- Add admonition blocks:
  - `[!NOTE]`, `[!TIP]`, `[!IMPORTANT]`, `[!WARNING]`, `[!CAUTION]`
- Fix log inspection command:
  ```bash
  doas tail -f /var/log/ytlocal.log
  ````

* Add path placeholders and clarify permission requirements
* Remove legacy and duplicate content

Reviewed-on: #1
Co-authored-by: Astounds <kirito@disroot.org>
Co-committed-by: Astounds <kirito@disroot.org>

youtube/templates/licenses.html

@@ -29,6 +29,11 @@
                 <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
                 <td data-label="Source"><a href="/youtube.com/static/js/common.js">common.js</a></td>
             </tr>
+            <tr>
+                <td data-label="File"><a href="/youtube.com/static/js/hls.min.js">hls.min.js</a></td>
+                <td data-label="License"><a href="https://spdx.org/licenses/BSD-3-Clause.html">BSD-3-Clause</a></td>
+                <td data-label="Source"><a href="https://github.com/video-dev/hls.js/tree/v1.6.15/src">hls.js v1.6.15 source</a></td>
+            </tr>
             <tr>
                 <td data-label="File"><a href="/youtube.com/static/js/hotkeys.js">hotkeys.js</a></td>
                 <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
@@ -40,9 +45,24 @@
                 <td data-label="Source"><a href="/youtube.com/static/js/playlistadd.js">playlistadd.js</a></td>
             </tr>
             <tr>
-                <td data-label="File"><a href="/youtube.com/static/js/plyr-start.js">plyr-start.js</a></td>
+                <td data-label="File"><a href="/youtube.com/static/js/plyr.dash.start.js">plyr.dash.start.js</a></td>
                 <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
-                <td data-label="Source"><a href="/youtube.com/static/js/plyr-start.js">plyr-start.js</a></td>
+                <td data-label="Source"><a href="/youtube.com/static/js/plyr.dash.start.js">plyr.dash.start.js</a></td>
+            </tr>
+            <tr>
+                <td data-label="File"><a href="/youtube.com/static/js/plyr.hls.start.js">plyr.hls.start.js</a></td>
+                <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
+                <td data-label="Source"><a href="/youtube.com/static/js/plyr.hls.start.js">plyr.hls.start.js</a></td>
+            </tr>
+            <tr>
+                <td data-label="File"><a href="/youtube.com/static/js/sponsorblock.js">sponsorblock.js</a></td>
+                <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
+                <td data-label="Source"><a href="/youtube.com/static/js/sponsorblock.js">sponsorblock.js</a></td>
+            </tr>
+            <tr>
+                <td data-label="File"><a href="/youtube.com/static/js/storyboard-preview.js">storyboard-preview.js</a></td>
+                <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
+                <td data-label="Source"><a href="/youtube.com/static/js/storyboard-preview.js">storyboard-preview.js</a></td>
             </tr>
             <tr>
                 <td data-label="File"><a href="/youtube.com/static/modules/plyr/plyr.min.js">plyr.min.js</a></td>
@@ -55,9 +75,14 @@
                 <td data-label="Source"><a href="/youtube.com/static/js/transcript-table.js">transcript-table.js</a></td>
             </tr>
             <tr>
-                <td data-label="File"><a href="/youtube.com/static/js/watch.js">watch.js</a></td>
+                <td data-label="File"><a href="/youtube.com/static/js/watch.dash.js">watch.dash.js</a></td>
                 <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
-                <td data-label="Source"><a href="/youtube.com/static/js/watch.js">watch.js</a></td>
+                <td data-label="Source"><a href="/youtube.com/static/js/watch.dash.js">watch.dash.js</a></td>
+            </tr>
+            <tr>
+                <td data-label="File"><a href="/youtube.com/static/js/watch.hls.js">watch.hls.js</a></td>
+                <td data-label="License"><a href="http://www.gnu.org/licenses/agpl-3.0.html">AGPL-3.0 or later</a></td>
+                <td data-label="Source"><a href="/youtube.com/static/js/watch.hls.js">watch.hls.js</a></td>
             </tr>
         </tbody>
     </table>