Fix week numbering being off by one and add custom semester starts per module

db/migrate/20231001165128_add_semester_start_date_to_course.rb

@@ -0,0 +1,5 @@
+class AddSemesterStartDateToCourse < ActiveRecord::Migration[7.0]
+  def change
+    add_column :courses, :semester_start_date, :date, default: START_OF_YEAR_5_SEMESTER_1.to_date
+  end
+end