fix(module): use symlink for westech_r2/westech_r2 to resolve Frappe module path

Frappe get_module_path uses get_pymodule_path which constructs
westech_r2.westech_r2 for module resolution. The symlink makes
both "westech_r2" and "westech_r2.westech_r2" resolve to the same
directory, fixing the 3-level deep path bug.

westech_r2/westech_r2

@@ -0,0 +1 @@
+.

westech_r2/westech_r2/__init__.py

@@ -1,5 +0,0 @@
-import os
-
-# Make westech_r2.westech_r2 resolve to the parent westech_r2 package
-# so Frappe's get_module_path("Westech R2") works correctly.
-__path__ = [os.path.dirname(os.path.dirname(__file__))]