feat(source-control): add Tangled support

[nozamdavid]

Add tangled.org as a git provider.

Documentation: https://docs.tangled.org/
tg cli tool: https://tgcli.wisp.place/

[nozamdavid]

Implemented in #18694

[juliusmarminge]

Note

Grok responding on behalf of Julius.

Open PR #18694 looks like it will implement this — linking it so we can close this discussion when that lands.