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/tailwind.config.mjs

@@ -0,0 +1,25 @@
+export default {
+  content: ['./src/**/*.{astro,html,js,jsx,md,mdx,svelte,ts,tsx,vue}'],
+  darkMode: 'class',
+  theme: {
+    extend: {
+      colors: {
+        bg: 'var(--color-bg)',
+        surface: 'var(--color-surface)',
+        'surface-2': 'var(--color-surface-2)',
+        border: 'var(--color-border)',
+        'text-primary': 'var(--color-text)',
+        'text-muted': 'var(--color-text-muted)',
+        'text-dim': 'var(--color-text-dim)',
+        accent: 'var(--color-accent)',
+        'accent-hover': 'var(--color-accent-hover)',
+        'accent-subtle': 'var(--color-accent-subtle)',
+        teal: 'var(--color-teal)',
+      },
+      fontFamily: {
+        mono: ['"SF Mono"', '"Fira Code"', '"JetBrains Mono"', 'monospace'],
+      },
+    },
+  },
+  plugins: [],
+};