Add api for forges

[anbraten]

Changes

• [x] add list, get, create, patch, delete endpoints for forges for admins
• [x] list & get endpoints can be accessed by the public, but will only return id, url & type (needed for ui to show icon of forge and later on for the login to select a forge)

[woodpecker-bot]

Deployment of preview was torn down

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 139 lines in your changes missing coverage. Please review.

Project coverage is 24.84%. Comparing base (044c3a6) to head (812af92). Report is 16 commits behind head on main.

:exclamation: Current head 812af92 differs from pull request most recent head e3d7ab8

Please upload reports for the commit e3d7ab8 to get more accurate results.

Files	Patch %	Lines
server/api/forge.go	0.00%	101 Missing :warning:
server/api/org.go	0.00%	21 Missing :warning:
server/router/api.go	0.00%	9 Missing :warning:
server/model/forge.go	0.00%	8 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3733 +/- ## ========================================== - Coverage 25.81% 24.84% -0.97% ========================================== Files 362 358 -4 Lines 26725 25843 -882 ========================================== - Hits 6899 6421 -478 + Misses 19293 18929 -364 + Partials 533 493 -40 ```

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[xoxys]

It would still be nice to add tests for new code right from the beginning :see_no_evil:

[6543]

the problem is we do not have a "full integration" test framework - we would have to create one