[737] docs: open source preparations

[Ryun1]

List of changes

Refactor docs to prepare for open sourcing

• Changed placeholder email address in security and code of conduct.
• Removed old incorrect docs
• Fixed base readme links

Checklist

• related issue
• My changes generate no new warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the changelog
• I have added tests that prove my fix is effective or that my feature works

[Ryun1]

I somehow removed govtool/frontend/src/utils/getDRepID.ts... fixing it now

edit; fixed, and cleaned up with a force push