Settings Menu

This release introduces a settings page, allowing you to more easily configure the dashboard.

Additionally, many bugs are fixed, which were introduced by changes in one of the dashboard's dependencies.

It is marked as a prerelease for two reasons:

1. I cannot test it properly.
2. There seems to be an issue with the optimized parsing, which I can only resolve next week. Please ignore any warnings related to "Using pre-built C-extension if available, or (slow) fallback solution."

I will test it and make a proper release next week, as soon as I have access my main computer.

If you experience any issues, please let me know by opening a github issue or a new discussion topic in the steam workshop.

This release should be compatible with Stellaris 2.1.*, and with databases created with version 0.1.4 of the dashboard.