added constants for key paths referenced in rest of Python code

whereami.py

@@ -0,0 +1,9 @@
+"""
+Library of path constants to be used or referenced elsewhere.
+"""
+
+from custtypes import ExecutedPath
+from pathlib import Path
+
+USER_PATH: ExecutedPath = Path.home()
+PROJ_ROOT: ExecutedPath = Path(__file__).parent.resolve()