Game UI features

[vEnhance]

Create links on the text bottom for toggling card layout

New client-side option to show hotkeys in a corner near the card, which can also
be similarly toggled on and off

[vEnhance]

Screenshot:

[HiddeKoerts]

Some nice additions to make the more advanced interactions with the site more visible to the average user.

I think adding buttons for rotating the orientation and rotating the cards is very good. It works well and fits with the design language of the website.

I'm less convinced by the keyboard visualization. A few comments:

• 'Toggle keys' seems to indicate that the keyboard shortcuts themselves are enabled/disabled by pressing that button. I'd change it to something like 'Show keys' or something along those lines.
• The font used for indicating the keys seems inconsistent with the rest of the website. Please change it to a font that is used elsewhere as well.
• There seem to be some positioning issues. When playing around with the aspect ratio and size of the browser window, it seems to be a frequent occurrence that the letters indicating the keys overlap the boundaries of the cards significantly. For example:
  

Honestly, I think that the keyboard shortcuts for cards should be intuitive enough that one look at the 'Help' section should explain everything that's needed. Nevertheless I also see the value of this feature for making shortcuts more visible and helping people right at the beginning of switching to keyboard.

[vEnhance]

saw that development on this repo is starting back up again, so i'll try to bring this PR up to date at some point in january once i'm back in boston (at which point i'll probably drop the keyboard shortcut labels as suggested)

[vEnhance]

Updated the PR and merged in main. Only left the two links for card layout and dropped the keyboard thingy entirely.