Add the resource-management surface to the v0.2 CLI:
- weknora kb create --name X [--description Y] [--embedding-model Z]
- weknora kb delete <id> [--force]
- weknora doc list [--kb-id X | --kb NAME] [--page N] [--page-size M]
- weknora doc upload <file> [--kb-id X | --kb NAME] [--name custom]
- weknora doc delete <id> [--force]
doc/* uses Factory.ResolveKB so the cwd's project link is honored when
--kb-id is omitted. doc upload validates path existence with os.Stat
(rejects directories; follows symlinks to mirror SDK os.Open behavior).
doc list sorts by updated_at desc so newer items surface first.
Both delete commands route through cmdutil.ConfirmDestructive — the
"destructive op needs explicit user opt-in" pattern was about to be
copy-pasted across the new subtree, so it was extracted with the delete
commands as their first consumer. Saves the same dedup pass when v0.3
adds session/agent delete. (PR-12 later renames the flag from --force
to the global -y/--yes for gh-style consistency.)
iostreams.SetForTestWithTTY pairs with the existing SetForTest helper:
the latter never reports stdout as a TTY (singleton replacement uses an
in-memory buffer), so the confirm-yes / confirm-no test branches need a
TTY-on variant.
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