Improve the filter panel

[ngoclong19]

In this PR, I would like to add the following changes:

• Make the filters body scrollable. When there are many games, only part of the filter is visible.
• Sort filters and match results by game name. To make skimming through the filter easier.
• Update userscript header and fix ESLint warning.
• Format document with Prettier, and add config file.

Tested in Firefox 112, and Tampermonkey 4.18.1/Greasemonkey 4.11.

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Before

Only the top part of the filter is visible. Game name is not sorted.

On match result, game name is not sorted.

After

Filters and match results are sorted by game name. There is a scroll bar on the right.

[Rudokhvist]

Looks good to me. I wanted to add a scroll to filters for quite some time, but never had spare time for that, so I really appreciate that you took care of that. I can't fully test if it works fine since I don't have enough different cards sets to match, but code looks good so I trust that you tested it. Thank you!