completion: Add missing completions for repo, project, pipeline, browse commands

[rbansal42]

Context

Full codebase integration review of dynamic completions found 14 additional completion gaps across commands that were not in the original scope.

Missing Completions

repo commands (7 gaps)

1. repo clone - positional <workspace/repo> arg needs ValidArgsFunction
2. repo clone --branch - needs CompleteBranchNames
3. repo delete - positional <workspace/repo> arg needs ValidArgsFunction
4. repo view - positional [<workspace/repo>] arg needs ValidArgsFunction
5. repo fork - positional [<workspace/repo>] arg needs ValidArgsFunction
6. repo create --project - needs project key completion
7. repo sync --branch - needs CompleteBranchNames
8. repo set-default - positional [<workspace/repo>] arg needs ValidArgsFunction

project commands (1 gap)

9. project view - positional <project-key> arg needs ValidArgsFunction (requires new API: ListProjects)

snippet commands (1 gap)

10. snippet list --role - needs StaticFlagCompletion(["owner", "contributor", "member"])

pipeline commands (2 gaps)

11. pipeline list --status - needs StaticFlagCompletion for pipeline states
12. pipeline list --branch - needs CompleteBranchNames

browse command (1 gap)

13. browse --branch - needs CompleteBranchNames

root command (1 gap)

14. Global --repo persistent flag on root command needs CompleteRepoNames

Notes

• Items 1-8, 10-13 are straightforward additions using existing completion functions
• Item 9 may require a new CompleteProjectKeys function if a ListProjects API method exists
• Item 14 affects the global persistent flag and needs careful testing to ensure local --repo flags properly shadow it

Related

This was discovered during integration review of PR #40 (dynamic shell completions).

[rbansal42]

Fixed in v0.3.1 — added completions for repo clone/delete/view/fork/sync/setdefault, pipeline list --status/--branch, snippet list --role, and global --repo persistent flag.