style: use `import git_refs` everywhere
upload: suppress git push progress when quiet or non-TTY
tests: e2e: add tests for more `repo init` options
tests: e2e: add tests for sync failures
tests: e2e: add tests for manifest groups
tests: e2e: add tests for partial clones & the Android setup
tests: e2e: add tests for network-only & local-only syncs
tests: e2e: add tests for init, sync & common workflows
tests: e2e: fix harness on Windows, CI & inside git checkouts
style: use `import git_command` everywhere
style: use `import repo_logging` everywhere
style: use `import repo_trace` everywhere
style: use `import ctypes` everywhere
style: use `import error` everywhere
tests: e2e: add pytest fixtures & `e2e` marker
tests: e2e: add a client to run repo against the local server
tests: e2e: add a local smart HTTP git server
tests: e2e: add helpers to create bare git repos
tests: fail skipped tests in CQ
config: add subcommand to manage ~/.repoconfig/config
project: accept v3 git bundles in _IsValidBundle
sync, init: support repo.smartsync config and --head alias
sync: Provide a CLI command to opt in/out of smartsync for a user.
upload: reject --fix with --ignore-hooks or --no-verify