Restructure PyAutoMind prompts by work type (#23)

Implements autoprompt/redesign.md. The first folder level now describes the
KIND of work (feature/bug/refactor/docs/test/release/maintenance/research/
experiment, plus triage/ for unclear cases); the second names the target repo
or domain. This replaces the old repo-named top-level folders (autoarray/,
autofit/, autogalaxy/, autolens/, …) so PyAutoBrain can route intent to the
right specialist agent by reading the first path segment.

- Moved all 69 active prompts into <work-type>/<target>/ via git mv (history
  preserved). Numbered topic series (jax_substructure, weak, cluster, priors)
  kept together under their dominant work type. One unclear prompt parked in
  triage/ with a manual-review note.
- Lifecycle/meta folders (issued/, z_features/, z_vault/, shelved/, autoprompt/)
  are NOT work-types and keep their own names.
- Updated references so paths resolve: planned.md, the z_features trackers
  (cluster/jax_substructure/weak), and the priors in-folder tracker. Also
  repaired pre-existing rotten links to shipped cluster/weak prompts (→ issued/).
- Updated scripts/status.sh inventory, AGENTS.md layout, and skill docs
  (start_dev z_features audit list + examples, create_issue, register_and_iterate)
  to the work-type layout; routing still keys off @reponame in the body, so old
  <target>/<name>.md paths continue to resolve during transition.
- README: new "Prompt taxonomy" section (work-type → PyAutoBrain agent map,
  good prompt paths, optional metadata-header convention, migration note);
  added ROUTING.md and triage/README.md.


Claude-Session: https://claude.ai/code/session_01MMS6B2CqwaLwBfWGZRtCT9

Co-authored-by: Claude <noreply@anthropic.com>

Author: Jammy2211