docs: add onboarding guides and thin Sites for public vs private ops split Architecture, Firestore schema, Environment, Cloud Functions, and Testing; point study deploy details at misinfo-dashboard-ops.
docs: update Technical Documentation modal references Point New Report docs at AgencyReportModal after the rename.
Update links in Archiving and Technical Documentation for consistency and clarity; enhance installation instructions and Firebase setup details.
Remove header from Technical Documentation to streamline content presentation.
rename technical documentation for Misinfo Dashboard.