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-cli/src/output.rs

@@ -19,17 +19,14 @@ pub fn print_generate_summary(model: &ProjectModel) {
     println!("  {} {}",  "Edges:".bold(),
         model.edges.module_import_edges.len() + model.edges.symbol_call_edges.len());
 
-    let integrations: Vec<&str> = {
-        let mut v = Vec::new();
-        if model.symbols.values().any(|s| s.integrations_flags.http) { v.push("HTTP"); }
-        if model.symbols.values().any(|s| s.integrations_flags.db) { v.push("DB"); }
-        if model.symbols.values().any(|s| s.integrations_flags.queue) { v.push("Queue"); }
-        if model.symbols.values().any(|s| s.integrations_flags.storage) { v.push("Storage"); }
-        if model.symbols.values().any(|s| s.integrations_flags.ai) { v.push("AI/ML"); }
-        v
-    };
-    if !integrations.is_empty() {
-        println!("  {} {}", "Integrations:".bold(), integrations.join(", ").yellow());
+    if !model.classified_integrations.is_empty() {
+        let cats: Vec<String> = model.classified_integrations.iter()
+            .filter(|(_, pkgs)| !pkgs.is_empty())
+            .map(|(cat, pkgs)| format!("{} ({})", cat, pkgs.join(", ")))
+            .collect();
+        if !cats.is_empty() {
+            println!("  {} {}", "Integrations:".bold(), cats.join(" | ").yellow());
+        }
     }
     println!("{}", "─────────────────────────────────────".dimmed());
 }