This release contains BREAKING CHANGES in the database structure!

Added
-----

- extensions to the markdown renderer for:
   - anchors for headings
   - table rendering
   - task list items
- linkable line number for file viewer

Changed
-------

- **BREAKING CHANGE** configuration file format
- **BREAKING CHANGE** move database tables to custom schemas
- move database migration files to custom path
- adjust migration tooling accordingly
- move some types and classes to other modules
- limit length of patch comment shown on repository overview page

- remove unused imports and variables
- add some debug logging

- create two migrators properly
- migrate hub and tickets database schemas as expected

Fixes: 252c14a83f46a13760979e5af3a79fb46772670a

- remove unused imports
- remove unused variables

This patch is _huge_ and breaks out the already implemented tickets features
(labels and milestones) into a separate module. Very likely the ticketing
will move into a service of its own so this will ease things further down
the road. But yes, it has complicated things now. ;-)

BREAKING CHANGES
----------------

- module configuration is now wrapped into a top most "module" value

So instead of having

```
database
service
```

in the configuration for the hub module, now we have

```
hub {
  database
  service
}
```

General changes
---------------

- add more flexible ignore rule for module specific local configurations
- adjust options for the JVM when running sbt
- update Scala to 3.3.0-RC to be able to use code health checks
- enable code health checks (unused warnings etc.)
- update flyway to 9.15.2
- update circe to 0.14.5
- update os-lib to 0.9.1

Database layer and migrations
-----------------------------

- use schemas per module to avoid clashes within the same database
- move migration files into specific folders to avoid conflicts with flyway

Email module
------------

- add EmailAddress type (moved from hub Email type)

Hub module
----------

- move some types and classes to other modules because of usage also for
  tickets
- implement views (twirl templates) for tickets
- limit length of patch comment on repository overview page

i18n module
-----------

- add LanguageCode types (moved from hub module)

Security module
---------------

- add CsrfToken, Password, PasswordHash, UserId and Username (moved from
  hub module)

Tickets module
--------------

- add database migrations for base tables
- add base classes (moved from hub) and configuration