feat: hide contributors if edit button hidden

[wackerow]

Description

• Hides FileContributors component on pages marked with hideEditButton

Used on only a few pages, the hideEditButton flag is available for certain more-protected pages which intentionally limit community contributions for editing. In these cases, showing the file contributors component feels less appropriate.

Current affected pages

• /community/events/organizing/
• /cookie-policy/
• /foundation/
• /privacy-policy/
• /terms-of-use/
• /whitepaper/

cc: @konopkja

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[wackerow]

Side note, the current usage appears to be exclusively via the "static" layout. I've applied to patch to the three layouts that contained this component, but raises the question if it's worth even having hideEditButton as a front matter prop for any template other than static (i.e., docs or tutorials). I don't see a case when we'd want to hide that button for anything using those layouts, so maybe worth just removing.