Make the repository's primary source tree genuinely Python

The old tracked TypeScript snapshot has been removed from the repository history and the root  directory is now a Python porting workspace. README and tests now describe and verify the Python-first layout instead of treating the exposed snapshot as the active source tree.

A local archive can still exist outside Git, but the tracked repository now presents only the Python porting surface, related essay context, and OmX workflow artifacts.

Constraint: Tracked history should collapse to a single commit while excluding the archived snapshot from Git
Rejected: Keep the exposed TypeScript tree in tracked history under an archive path | user explicitly wanted only the Python porting repo state in Git
Confidence: medium
Scope-risk: broad
Reversibility: messy
Directive: Keep future tracked additions focused on the Python port itself; do not reintroduce the exposed snapshot into Git history
Tested: python3 -m unittest discover -s tests -v; python3 -m src.main summary; git diff --check
Not-tested: Behavioral parity with the original TypeScript system beyond the current Python workspace surface

src/bridge/__init__.py

@@ -0,0 +1,16 @@
+"""Python package placeholder for the archived `bridge` subsystem."""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+SNAPSHOT_PATH = Path(__file__).resolve().parent.parent / 'reference_data' / 'subsystems' / 'bridge.json'
+_SNAPSHOT = json.loads(SNAPSHOT_PATH.read_text())
+
+ARCHIVE_NAME = _SNAPSHOT['archive_name']
+MODULE_COUNT = _SNAPSHOT['module_count']
+SAMPLE_FILES = tuple(_SNAPSHOT['sample_files'])
+PORTING_NOTE = f"Python placeholder package for '{ARCHIVE_NAME}' with {MODULE_COUNT} archived module references."
+
+__all__ = ['ARCHIVE_NAME', 'MODULE_COUNT', 'PORTING_NOTE', 'SAMPLE_FILES']