This PR split the `Board` into two parts. One is the struct has been
renamed to `Column` and the second we have a `Template Type`.
But to make it easier to review, this PR will not change the database
schemas, they are just renames. The database schema changes could be in
future PRs.
---------
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: yp05327 <576951401@qq.com>
Fix https://github.com/go-gitea/gitea/pull/29874#discussion_r1542227686
- The migration of v292 will miss many projects. These projects will
have no default board. This PR introduced a new migration number and
removed v292 migration.
- This PR also added the missed transactions on project-related
operations.
- Only `SetDefaultBoard` will remove duplicated defaults but not in
`GetDefaultBoard`
