feat: smart integration detection with package classifier

- Add PackageClassifier with built-in dictionary (~200 popular packages)
- Hardcode Python 3.10+ stdlib list to filter out standard library imports
- Add PyPI API lookup for unknown packages (online mode, 3s timeout)
- Cache PyPI results in .wtismycode/cache/pypi.json
- Add --offline flag to skip PyPI lookups
- Classify packages into: HTTP, Database, Queue, Storage, AI/ML, Auth, Testing, Logging, Internal, Third-party
- User config integration_patterns override auto-detection
- Update renderer to show integrations grouped by category
- Update ARCHITECTURE.md template with new integration format

wtismycode-core/Cargo.toml

@@ -16,3 +16,5 @@ rustpython-parser = "0.4"
 rustpython-ast = "0.4"
 chrono = { version = "0.4", features = ["serde"] }
 tempfile = "3.10"
+ureq = "3"
+lazy_static = "1.4"