feat: create feature flag for PLS custom pacing

common/lib/xmodule/xmodule/modulestore/xml_importer.py

@@ -1051,7 +1051,7 @@ def allowed_metadata_by_category(category):
     return {
         'vertical': [],
         'chapter': ['start'],
-        'sequential': ['due', 'format', 'start', 'graded']
+        'sequential': ['due', 'due_num_weeks', 'format', 'start', 'graded']
     }.get(category, ['*'])
 
 

common/lib/xmodule/xmodule/seq_module.py

@@ -79,6 +79,12 @@ class SequenceFields:  # lint-amnesty, pylint: disable=missing-class-docstring
         scope=Scope.settings,
     )
 
+    due_num_weeks = Integer(
+        display_name = _("Number of Weeks Due By"),
+        help=_("Enter the number of weeks the problems are due by"),
+        scope = Scope.settings,
+    )
+
     hide_after_due = Boolean(
         display_name=_("Hide sequence content After Due Date"),
         help=_(
@@ -195,6 +201,7 @@ class ProctoringFields:
         default=False,
         scope=Scope.settings,
     )
+    
 
     def _get_course(self):
         """