- Change Gitea to Forgejo where necessary.
- Point all documentation to Forgejo's documentation.
- Resolves#992
(cherry picked from commit d0b78a6ede)
(cherry picked from commit e2382f30ba)
(cherry picked from commit c41cf05a33)
(cherry picked from commit 797e598ae7)
(cherry picked from commit 970031a1c2)