Add aperiodic monotiles to landing page

[Splines]

A fresh and interactive landing page look for the next releases (starting with 1.9.0 #546 #561 ) using the newly found aperiodic monotiles, see the official web page and the repo with the BSD3-licensed code.

Different colors (which I prefer as the overall tone is more balanced):

Issues

• Matrix multiplication is implemented in JS, that's why it is a bit slow. Try to hit Reset, then 2x "Monotile". The pattern will then not fill up the whole screen but is far more responsive. We could also have it initialized this way...
  

• On tablets, we cannot scroll the website anymore as the dragging of the canvas is somehow taking precedence.

• I've changed one color to red. If you don't like it, we can change it back to grey as it is here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3bccb52) 66.48% compared to head (ee76cd9) 66.51%.
Report is 31 commits behind head on mampf-next.

❗ Current head ee76cd9 differs from pull request most recent head 9723468. Consider uploading reports for the commit 9723468 to get more accurate results

Additional details and impacted files

@@              Coverage Diff               @@
##           mampf-next     #543      +/-   ##
==============================================
+ Coverage       66.48%   66.51%   +0.03%     
==============================================
  Files             311      311              
  Lines            9417     9423       +6     
==============================================
+ Hits             6261     6268       +7     
+ Misses           3156     3155       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Splines]

@fosterfarrell9 I've added the aperiodic monotiles (ein stein) as interactive background. Currently available on experimental for you to try out. More infos in the PR.

[fosterfarrell9]

Is it possible to make the tiles bigger? I think that the current size makes it look a little restless/"unruhig".
(I have shown it to several people. Another suggestion was to reduce the opacity for the tile image a bit).

[Splines]

@fosterfarrell9 I've made the tiles bigger and darkened the colors to make the background less busy/jarring. Due to the bigger tiles, the numer of tiles generated are reduced which also makes the page run more smoothly.
I've also fixed the issue on mobile devices, it should work on all devices now (buttons are disabled on small devices and you cannot drag the background, otherwise one could not scroll the site anymore). I've also implemented a small logic to disable the "monotile" button as to not freeze browsers when generating too many tiles.

[Splines]

@fosterfarrell9 Requesting a review just for the last two commits where I merged the lint/eslint-all branch into this branch. You probably want to review #575 first (e.g. maybe some rules will change due to your review and then we'd have to update here accordingly).

Note that this branch currently has commits from #575 on it. These will go away, once we've merged #575 into mampf-next.