chore: align Grok/Kimi manifest keywords with the canonical list

The new .grok-plugin and .kimi-plugin manifests split between the full
11-keyword list (claude, copilot) and the minimal 5 (cursor, codex). Align
both new plugins to the full canonical keyword set used by the flagship
.claude-plugin/plugin.json for consistency.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Rodriguespn

.kimi-plugin/plugin.json

@@ -15,7 +15,13 @@
     "postgres",
     "database",
     "backend",
-    "mcp"
+    "mcp",
+    "auth",
+    "storage",
+    "realtime",
+    "edge-functions",
+    "migrations",
+    "rls"
   ],
   "skills": "./skills/",
   "mcpServers": {