lms: add activity child table and create frontend

Co-authored-by: Chinmay Pai <chinmaydpai@gmail.com>
diff --git a/erpnext/www/lms/course.py b/erpnext/www/lms/course.py
new file mode 100644
index 0000000..453c9c7
--- /dev/null
+++ b/erpnext/www/lms/course.py
@@ -0,0 +1,2 @@
+# current_module = frappe.get_doc("Course", frappe.form_dict["lesson"])
+# current_lesson = frappe.get_doc("Lesson", frappe.form_dict["lesson"])
\ No newline at end of file