refactor: renamed app to lms

lms/www/batch/join.py

@@ -0,0 +1,8 @@
+import frappe
+
+def get_context(context):
+    context.no_cache = 1
+    batch_name = frappe.form_dict["batch"]
+    context.batch = frappe.get_doc("LMS Batch", batch_name)
+    context.already_a_member = context.batch.is_member(frappe.session.user)
+    context.batch.course_title = frappe.db.get_value("LMS Course", context.batch.course, "title")