updating data models to have status for both week and day and updated calendar to complete based on status

src/app/models/plan.model.ts

@@ -12,5 +12,12 @@ export interface Plan {
 export interface Week {
     week: number,
     totalMilage: number,
+    status: Status,
     workouts: Workout[]
+}
+
+export enum Status {
+    Complete = 'complete',
+    Incomplete = 'incomplete',
+    Skipped = 'skipped'
 }