Merge: Restore root-level structure + add skills/docs/codebases

- Restored original root-level src/, package.json, etc.
- Added skills/ directory with Claude Code skills
- Added original-docs/ with source documentation
- Added codebases/z-ai-tooling/ as reference codebase
- Updated README.md with complete documentation

Total: Combined 82 original files + new skills structure

codebases/z-ai-tooling/Caddyfile

@@ -0,0 +1,23 @@
+:81 {
+	@transform_port_query {
+		query XTransformPort=*
+	}
+
+	handle @transform_port_query {
+		reverse_proxy localhost:{query.XTransformPort} {
+			header_up Host {host}
+			header_up X-Forwarded-For {remote_host}
+			header_up X-Forwarded-Proto {scheme}
+			header_up X-Real-IP {remote_host}
+		}
+	}
+
+	handle {
+		reverse_proxy localhost:3000 {
+			header_up Host {host}
+			header_up X-Forwarded-For {remote_host}
+			header_up X-Forwarded-Proto {scheme}
+			header_up X-Real-IP {remote_host}
+		}
+	}
+}