docs: add contributing pages

[xDivisionByZerox]

The goal of this PR is to fix #1513.

Similar to ESLint's Contribution documentation, this PR adds a new "Contributing" Section to our Webdocumentation. The overall goal of this (as well as follow up PRs) was to migrate the contents of the CONTRIBUTION file on GitHub with a full fledged documentation on our website. Having the the additional mark up power of vitepress lets us structure these docs in a more abstract why than to dump everything into a single play markdown file. Since this has already been questioned in the comments, I'll hope to discuss the matter with you in the PR or a team meeting.

My plan is to add an additional "Active Development" page later on. This way the rest of the CONTRIUTION section can be addresses in a meaningmul way, without making the "Submit a Pull Request" page more overwhelming than it already is. I'm open to additional suggestion, tho.

Do not forget to check out the new docs via the netlify deploy preview.

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[!NOTE] I'll admit that I've used the help of some AI tools to structure the overall file hierarchy. Since I am not native in English, I do hope this reduces the need for spelling and grammar fixes drastically as well.

[!IMPORTANT] My commit messages are marked as "Unverified" right now, since my PC broke down last Thursday. I'm currently on a temporary device which I am to lazy to configure. Sorry for the inconvenience.

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.97%. Comparing base (f08b243) to head (c2ae14f). Report is 2 commits behind head on next.

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #2869   +/-   ##
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  Coverage   99.97%   99.97%           
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  Files        2880     2880           
  Lines      220503   220510    +7     
  Branches      952      952           
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+ Hits       220450   220457    +7     
  Misses         53       53           

see 2 files with indirect coverage changes

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[matthewmayer]

Is the end goal that this replaces CONTRIBUTING.md and that becomes a stub pointing at the web version?

[Shinigami92]

Is the end goal that this replaces CONTRIBUTING.md and that becomes a stub pointing at the web version?

I hope not 👀 IMO "contributing" is more a GitHub related thing, than a user facing documentation 🤔

[xDivisionByZerox]

This PR is now ready for reaview. I've updated the description, in the hope of bringing more clearity to the intend of the PR. Please read it before asking new questions regarding the overall matter.