Have a cleaner implementation of Tuleap Branch Source Plugin

Add GET /git/:id/branches

[
    {
        "name": "master",
        "commit": {
            "id": "6dcb09b5b57875f334f61aebed695e2e4193db5e"
        }
    },
    {
        "name": "develop",
        "commit": {
            "id": "2ba20bda73ed9ab9b7d745a83ab5328fb02295d7"
        }
    },
    ...
]

To list all branches that are readable by the user.

The route is paginated.

Add GET /git/:id/files?path=path/to/file&ref=string

{
    "encoding": "base64",
    "size": 5362,
    "name": "file",
    "path": "path/to/file",
    "content": "encoded content ..."
}

To get the content of a file on a given ref. If no ref given, refs/heads/master is used. The file is returned only if the requester can read it.
If the file does not exist of the requested path is not a file, a 404 will be thrown.
If the reference does not exist a 404 will be thrown.