licence: Fabled Grimoire is AGPL-3.0-only

LICENSE carries the GNU Affero General Public License v3.0 text, the same
file the other Fabled projects ship. pyproject.toml, the frontend's
package.json and lockfile, and the plugin manifest declare it as the SPDX
expression AGPL-3.0-only, and the README says what it asks of anyone who
runs a modified version over a network. Reading `license` as an SPDX
expression needs setuptools 77, so the build floor rises to it. The
project description now matches the README's tagline.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

plugin/.claude-plugin/plugin.json

@@ -1,10 +1,11 @@
 {
   "name": "grimoire",
   "description": "Grimoire for Claude Code: connects the grimoire MCP server, adds the hooks that deliver live project state and relevant records at the right moment, ships the shared client-neutral Grimoire skills (using-grimoire, writing-plans, reporting-back, systematic-debugging, verification, brainstorming, reusing-code, shape-accounting, family-canon), and syncs your saved Grimoire Processes as skills (/grimoire:sync).",
-  "version": "2026.10.22.1907",
+  "version": "2026.10.22.1945",
   "author": {
     "name": "Bryan Van Deusen"
   },
+  "license": "AGPL-3.0-only",
   "mcpServers": {
     "grimoire": {
       "type": "http",