docs: apply fleet-template (16-artifact scaffold)

Adds missing standard artifacts:
- README.md (if missing)
- AGENTS.md (AI agent contract)
- PLAN.md (current sprint)
- STATUS.md (where we are)
- DEVELOPMENT.md (dev workflow)
- DEPLOYMENT.md (deploy procedure)
- TESTING.md (test strategy)
- DECISIONS.md (ADR index + templates)
- .github/CODEOWNERS
- .github/workflows/ci.yml

Preserves all existing artifacts.

Refs: RugMunchMedia/fleet-template

wrangler.toml

@@ -0,0 +1,15 @@
+name = "pry-mcp"
+main = "workers/mcp-worker.js"
+compatibility_date = "2026-07-01"
+compatibility_flags = ["nodejs_compat"]
+
+[env.production]
+vars = { PRY_API_URL = "https://pry.dev" }
+
+# Optional: route a custom subdomain to this worker
+# routes = [
+#   { pattern = "mcp.pry.dev", custom_domain = true }
+# ]
+
+# Secrets (set via `wrangler secret put PRY_API_KEY`):
+# PRY_API_KEY = ""