Feature: Convert Say, Pi Userscript to Chrome Extension

[rosscado]

This PR represents the culmination of efforts to convert the "Say, Pi" userscript into a full-fledged Chrome extension. This transition not only enhances the stability and performance of "Say, Pi" but also paves the way for future enhancements and features.

Key Changes

• Extension Manifest: Created a manifest.json file to define the Chrome extension, pointing to the existing saypi.user.js as the entry-point content script.
• Code Compatibility: Modified the codebase to ensure compatibility between the userscript and the Chrome extension environments. This includes handling the GM_info object and removing the need for script injection for audio module functionalities.
• Local Resource Loading: Updated the way WASM files are loaded for the VAD library. Now, these files are served locally within the extension, significantly improving loading times and adhering to Chrome's security policies.
• Refactored AudioModule: Transformed AudioModule.js into an ES6 module, removing the need for DOM injection and streamlining the codebase.
• Server Configuration: Updated server.js to handle HTTPS setup more flexibly, allowing the server to start without requiring certificate files in non-production environments.
• Updated Build Process: Adjusted the Webpack configuration to align with the new structure and requirements of the Chrome extension.

Demo Video

https://youtu.be/siJAj879ii4

Testing

• Extensively tested in both the Chrome extension and userscript environments.
• Tested in the following Chromium browsers: Google Chrome, Microsoft Edge, Kiwi Browser (Android)
• Verified functionality such as speech-to-text enhancement, audio processing, and compatibility across different domains.

Next Steps

• Submit the extension to the Chrome Web Store for review and publication.
• Monitor for any issues or feedback from users post-release.
• Plan for introducing a paid tier in the future, as per the project roadmap.

Notes

• Ensure to review the README.md and documentation for any necessary updates to reflect these changes.
• Team members are encouraged to pull the latest changes and test the extension in their local environments.

Commits

• Add extension manifest
• Extension icons
• Safe reference to GM_info
• Remove page injection (BIG WIN)
• Remove remote fetch
• Chat bubble extension icons
• Improve Security and Performance by Loading VAD WASM Files Locally
• Add author and homepage URL to manifest.json
• Extension description
• Fix maximize/exit mode button

[rosscado]

Closes #43

[rosscado]

Chrome extension submitted to the Chrome Web Store and pending review.