chore: scaffold tools/ package + stdlib http client

Per sub-project-2 plan Task 1. Adds tools/ to setuptools packages,
gitignores media/, and a minimal injectable urllib HTTP client.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test_tools_smoke.py

@@ -0,0 +1,5 @@
+def test_tools_package_imports():
+    import tools
+    import tools.http
+
+    assert tools is not None