feat(project-manager): integrate NotebookLM into discover and brainstorm v1.1

Add NotebookLM (Gemini 2.5 RAG) as primary internal knowledge source for
/discover and /brainstorm skills, complementing existing Dify KB datasets.

- /discover: NotebookLM as first source in Fase 1 (Pesquisa Interna)
- /brainstorm: NotebookLM Passo A before Dify KB Passo B in Fase 2
- datasets.json: dual-source structure (notebooklm + dify_kb)
- plugin.json: bump to v1.1.0, update description
- 7 notebooks mapped to topics for intelligent routing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

project-manager/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "project-manager",
-  "description": "Spec-driven project management with flexible sprints, scope validation, and metrics. Prevents wasted work by forcing alignment before coding. 4 skills, 2 agents, 1 hook.",
-  "version": "1.0.0",
+  "description": "Spec-driven project management with flexible sprints, scope validation, and NotebookLM-powered discovery. Prevents wasted work by forcing alignment before coding. 6 skills, 2 agents, 1 hook.",
+  "version": "1.1.0",
   "author": {
     "name": "Descomplicar - Crescimento Digital",
     "url": "https://descomplicar.pt"