chore(gitignore): add generated config and testing modules

- src/config/: temporary config generation modules
- src/testing/: coverage analyzer and testing utilities
- tools/research/: supplementary research generators

These directories contain transient/generated code that should not be tracked.

Resolves git hygiene (#415)

Author: Antigravity Agent

.gitignore

@@ -311,3 +311,8 @@ apps/queen/*.swiftdeps~
 apps/queen/*.png
 data/cells/
 src/tools/uart-echo-test
+
+# Generated config and testing modules (temporary)
+src/config/
+src/testing/
+tools/research/