Kaia Planet Registry v0.1.3

Internal Kaia Spec / Planet registry plugin.

v0.1.3
- Adds a copyable Kaia one-paste input specification so the AI does not need to remember the format.
- Fixes one-paste precedence: pasted KEY: VALUE / TSV values now populate empty form fields during registration.
- Adds a registration-result panel showing the issued/registered management ID and CNT/HOLD state immediately.
- Adds one-click copy buttons for result ID, CNT/state, posting tag, and every registry-list ID.
- Keeps the independent Kaia Registry admin menu and plugin-list Settings link.
- Keeps safe HOLD default, HOLD unique IDs, validation, duplicate-ID protection, dated exports, and Excel 2007-compatible XLSX output.

Compatibility baseline
- WordPress 6.0+
- PHP 7.4+
- XLSX export intentionally uses simple Office Open XML compatible with Excel 2007; no modern Excel-only formulas/features.

Data continuity
- Registry rows and CNT authority data remain in the existing WordPress options:
  kaia_planet_registry_rows
  kaia_planet_registry_cnt
- Updating plugin files does not replace those existing options.
