Workspace rules need a git remote, but learn status says "not linked" for a linked project #1663

Found during the v0.12.9 end-to-end run (#1647).

Workspace rules are keyed by the project's git remote (rules/sync.ts: no_remote). In a project linked by path (no git remote):

• learn status prints Workspace rules: not linked (run \altimate-code link`)althoughworkspace status` shows the project linked, so the suggested fix does nothing.
• learn sync prints Rules sync skipped: this project has no git remote.
• Adding a remote later and running link --workspace <id> --yes keeps the path binding (Matched by path), so rules stay off until the project is unlinked and linked again.
• configure/learn.md doesn't say rules need a git remote.

Suggested: have learn status say rules need a git remote, document it, and let link move a path binding to the remote once one exists.