docs: add FLE bridge direction pivot and squad-injection test tooling

Adds the app-centric FLE bridge direction (direction.md) replacing the
Blaze-backend route as primary plan, plus a corrected foundational test
procedure and snapshot/diff/apply tooling for reverse-engineering FLE's
Freeze Lineup write mechanism. Also picks up prior untracked research docs
(status-review, fut-integration-options, fifa23-startup-flow, track-c) and
existing capture/export tooling that hadn't been committed yet.

.gitignore

@@ -14,6 +14,10 @@ target/
 # Captures (runtime data, not source)
 openfut-bridge/captures/
 
+# Python
+__pycache__/
+*.pyc
+
 # Editor
 .vscode/
 .idea/