Refactor code structure for improved readability and maintainability

Remove debugging border from the websr plugin's styling

Enhance canvas sizing logic in artplayer-plugin-websr

- Updated canvas positioning to center it within the player.
- Introduced a new function to calculate canvas size based on the video aspect ratio.
- Adjusted canvas dimensions during initialization and on resize events to maintain aspect ratio.
- Ensured canvas styles are updated to reflect the calculated dimensions.

feat: add comparison mode to artplayer-plugin-websr

- Updated README.md to reflect new comparison feature and simplified content.
- Modified package.json to remove unnecessary keywords.
- Enhanced index.js to implement comparison functionality, allowing users to compare original and upscaled video.
- Added new methods for enabling, disabling, and toggling comparison mode, as well as setting and getting the comparison position.
- Updated TypeScript definitions to include new comparison options and methods.

docs/index.html

@@ -120,6 +120,10 @@
                             <a
                                 href="/?libs=./uncompiled/artplayer-plugin-audio-track/index.js&example=audio.track">artplayer-plugin-audio-track</a>
                         </li>
+                        <li>
+                            <a
+                                href="/?libs=./uncompiled/artplayer-plugin-websr/index.js&example=websr">artplayer-plugin-websr</a>
+                        </li>
                     </ul>
                     <ul>
                         <li class="title">Proxys</li>