Kaia Planet Registry v0.1.1

Internal Planet registry / numbering desk.

v0.1.1
- Independent Kaia Registry admin menu.
- Settings link on WordPress Plugins screen.
- HOLD is the safe default after every load/registration.
- Multiple HOLD records get unique IDs (KS-HOLD-####).
- Existing-CNT registration requires an actually registered CNT.
- New-CNT registration requires a title.
- Empty/invalid registration is blocked instead of creating bare "KS" records.
- Duplicate management IDs are blocked.
- XLSX/CSV export filenames include Planet local acquisition date: kaia-registry-YYYYMMDD.*
- XLSX remains deliberately simple and Excel 2007 compatible (no modern formulas/features).

Shortcode (administrator only):
[kaia_registry_search]

Existing v0.1.0 registry data is kept in WordPress options when updating the plugin.
