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/__init__.py

@@ -0,0 +1,19 @@
+"""Python porting workspace for the Claude Code rewrite effort."""
+
+from .commands import PORTED_COMMANDS, build_command_backlog
+from .parity_audit import ParityAuditResult, run_parity_audit
+from .port_manifest import PortManifest, build_port_manifest
+from .query_engine import QueryEnginePort
+from .tools import PORTED_TOOLS, build_tool_backlog
+
+__all__ = [
+    'ParityAuditResult',
+    'PortManifest',
+    'QueryEnginePort',
+    'PORTED_COMMANDS',
+    'PORTED_TOOLS',
+    'build_command_backlog',
+    'build_port_manifest',
+    'build_tool_backlog',
+    'run_parity_audit',
+]