docs: reposition around team-coordination, sync specs to code, prune stale docs

Reframe README around the real bottleneck (human coordination, not
engineering ability) with the "five-minute meeting" cost story; rewrite the
demo script to match. Update gemini/livekit/mongodb/digitalocean specs to
reflect shipped code (Gemini Live agent, TTS, embeddings, Lyria via
Interactions API; current API routes; hermes_jobs collections). Add hermes.md.
Rename graph.md -> cont_learning.md. Remove outdated/dead docs (agent-learning
scaffolding, graph-discovery, handoffs, superpowers, idea/plan/demo-setup) and
the bundled LiveKit starter under examples/. Rewire CLAUDE.md doc-first gate
off the deleted PLAN.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LuV8W8oNYRsDWKoqK8Mkqc

shared/src/graph.ts

@@ -5,7 +5,7 @@
  *
  * Served embedded in the `team_model` document; mirrored into `graph_nodes` /
  * `graph_edges` collections so the model can be walked with MongoDB
- * `$graphLookup`. See docs/graph.md.
+ * `$graphLookup`. See docs/cont_learning.md.
  */
 
 export type PodGraphNodeKind = 'engineer' | 'feature' | 'file' | 'collision' | 'intervention';