feat: add support for droid

[dragove]

AI crafted code, working for me. Any edits are appreciated.

droid hooks reference can be found here

the document shows it uses snake_case. However it actually use camelCase.

[svarlamov]

@dragove Thank you for your contribution! I think we're getting really close here. Any chance you could:

1. Merge the latest git-ai main branch back into your fork
2. Implement the install hooks flow for droid as well. We require all agent integrations to either be first-party or have an automated hooks installer setup. I would point your coding agent here: https://github.com/git-ai-project/git-ai/tree/main/src/mdm/agents

[dragove]

@svarlamov
I've rebased onto main and modify some logic to get better experience.
install-hooks logic is implemented and prevent droid import hooks from claude.
Model field is not present from droid hooks. So model will always be unknown