COMMUNITY_GUIDELINES.md: Create from Gentoo

This is to discuss a bit on having community guidelines, as started into #pleroma-dev on 2022-02-27.

I'd like to see CoC mention the scope where it applies, i.e. development discussion in MRs and IRC and such, public annoucments/speaking (publicly) from position of power.

Far too many community guidelines nowadays overextend to other social/private life, i.e. you supposed to follow Twitch's rules even when you're on Fedi/Twitter/Reddit/4chan/whatever, not following the rules CAN get you banned on Twitch and it's bullshit (IMO).

As ademan mentioned in IRC it should also have "assumption of good faith" aka presumption of innocence https://en.wikipedia.org/wiki/Presumption_of_innocence

Tried to add it, like via amending on "**Admit the possibility of fault and respect different point of views.**" or adding another point but I didn't find a way to make it work nicely, got some suggestions?

mentioned in merge request pleroma!3579 (closed)

mentioned in issue pleroma#2900 (closed)

mentioned in merge request pleroma!3701 (merged)

added 2 commits

• 6b4fc3bf - COMMUNITY_GUIDELINES.md: Gentoo → Pleroma
• 69ce604a - COMMUNITY_GUIDELINES.md: Proctors → Maintainers

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added 6 commits

• 0fed1005 - COMMUNITY_GUIDELINES.md: Gentoo → Pleroma
• 4670bca8 - COMMUNITY_GUIDELINES.md: Improve Attribution
• 9b87b5be - COMMUNITY_GUIDELINES.md: Proctors → Maintainers
• d2ac932b - COMMUNITY_GUIDELINES.md: distribution → project
• c3c85b2d - COMMUNITY_GUIDELINES.md: Pleroma community → Pleroma Development community
• 38338bd7 - COMMUNITY_GUIDELINES.md: Infra adaptation

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