feat(reading): fill the five full-reading modules missing from upstream

The western comparison layer was invoked without its files, so it stayed blocked. Navamsha and Niryaana Shoola are filled from the native rashi dashas.

Co-Authored-By: Grok (agent loop)
Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/_script_root.py

@@ -0,0 +1,14 @@
+"""Put the repository root on sys.path for scripts copied from upstream.
+
+Those modules optionally import ``_script_root`` before their other imports.
+This file only adjusts the import path. It does not calculate charts.
+"""
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+root_text = str(ROOT)
+if root_text not in sys.path:
+    sys.path.insert(0, root_text)