fix: upsert admin team and create repo

[merll]

This PR changes the behavior of the Gitea operator so that it also ensures existence of the team-admin organization and creates a repository to deploy manifests through ArgoCD.
Error handling has been changed to raise exceptions directly (since any errors eventually lead to calling exit anyway).

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🔴	Statements	34.06% (-0.27% 🔻)	342/1004
🔴	Branches	16.81% (-0.36% 🔻)	40/238
🔴	Functions	18.68% (+0.69% 🔼)	34/182
🔴	Lines	34.33% (-0.34% 🔻)	311/906

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🔴	operator/gitea.ts	28.31% (-0.86% 🔻)	10.13% (-0.68% 🔻)	21.54% (+2.09% 🔼)	27.98% (-1.08% 🔻)

Test suite run success

20 tests passing in 4 suites.

Report generated by 🧪jest coverage report action from 1881868

[merll]

Setting this to draft until #192 is merged. Likely to conflict.

[ElderMatt]

I have tested and it works now for team-admin, I did have to refresh team-admin in argocd myself.