feat: add gitea support

[sparsick]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 89.60000% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.56%. Comparing base (23114fe) to head (3bcf9ba).

Files with missing lines	Patch %	Lines
...testcontainers/gitserver/gitea/GiteaContainer.java	88.34%	11 Missing and 1 partial ⚠️
...ck/testcontainers/gitserver/gitea/SshIdentity.java	90.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #274      +/-   ##
============================================
- Coverage     90.93%   90.56%   -0.38%     
- Complexity       86      117      +31     
============================================
  Files            11       14       +3     
  Lines           320      445     +125     
  Branches          8        9       +1     
============================================
+ Hits            291      403     +112     
- Misses           27       39      +12     
- Partials          2        3       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.