Rename .pi to .feynman, rename citation agent to verifier, add website, skills, and docs

- Rename project config dir from .pi/ to .feynman/ (Pi supports this via piConfig.configDir)
- Rename citation agent to verifier across all prompts, agents, skills, and docs
- Add website with homepage and 24 doc pages (Astro + Tailwind)
- Add skills for all workflows (deep-research, lit, review, audit, replicate, compare, draft, autoresearch, watch, jobs, session-log, agentcomputer)
- Add Pi-native prompt frontmatter (args, section, topLevelCli) and read at runtime
- Remove sync-docs generation layer — docs are standalone
- Remove metadata/prompts.mjs and metadata/packages.mjs — not needed at runtime
- Rewrite README and homepage copy
- Add environment selection to /replicate before executing
- Add prompts/delegate.md and AGENTS.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/src/content/docs/workflows/autoresearch.md

@@ -0,0 +1,44 @@
+---
+title: Autoresearch
+description: Autonomous experiment optimization loop
+section: Workflows
+order: 8
+---
+
+## Usage
+
+```
+/autoresearch <idea>
+```
+
+## What it does
+
+Runs an autonomous experiment loop:
+
+1. **Edit** — Modify code or configuration
+2. **Commit** — Save the change
+3. **Benchmark** — Run evaluation
+4. **Evaluate** — Compare against baseline
+5. **Keep or revert** — Persist improvements, roll back regressions
+6. **Repeat** — Continue until the target is hit
+
+## Tracking
+
+Metrics are tracked in:
+
+- `autoresearch.md` — Human-readable progress log
+- `autoresearch.jsonl` — Machine-readable metrics over time
+
+## Controls
+
+```
+/autoresearch <idea>     # start or resume
+/autoresearch off        # stop, keep data
+/autoresearch clear      # delete all state, start fresh
+```
+
+## Example
+
+```
+/autoresearch optimize the learning rate schedule for better convergence
+```