initial: pi config — agents, prompts, skills, settings

Captures:
- 12 agent definitions (vigilio + a-team + utility)
- 8 mission prompt configurations
- 3 skills (forgejo, senior-software-engineer, xai-docs)
- pi settings.json (default provider/model)

.pi/agent/prompts/scout-and-plan.md

@@ -0,0 +1,9 @@
+---
+description: Scout gathers context, planner creates implementation plan (no implementation)
+---
+Use the subagent tool with the chain parameter to execute this workflow:
+
+1. First, use the "scout" agent to find all code relevant to: $@
+2. Then, use the "planner" agent to create an implementation plan for "$@" using the context from the previous step (use {previous} placeholder)
+
+Execute this as a chain, passing output between steps via {previous}. Do NOT implement - just return the plan.