Vidify

* Small performance improvements

Fixed
* Mpv correctly freezes finished videos [101]
* More user-friendly docs inside Vidify [94]

Added
Support for [vidify-audiosync v0.3.0](https://github.com/vidify/audiosync/releases/tag/v0.3.0).

Added
* **Official website release!**: Check out https://github.com/vidify/vidify.org-source. The links in the app have been updated to it [86]
* **Not installed modules will now appear disabled in the initial screen.** APIs and Players that aren't compatible with the system won't appear at all. [80]
* `vidify --help` now also shows the **default values**
* Many internal improvements [88]
* Build automation, GitHub Actions CI, Docker integration [82]

Fixed
* Mpv is now terminated correctly [89]

Fixed
* PySide2 is excluded from built bundles. This reduces the zip size by 45MB.