Add Plan page with day planner

backend/database/models/plan.go

@@ -0,0 +1,25 @@
+package models
+
+import (
+	"gorm.io/datatypes"
+)
+
+type PlanDay struct {
+	Date      datatypes.Date `gorm:"primaryKey"`
+	Morning   datatypes.JSON
+	Midday    datatypes.JSON
+	Afternoon datatypes.JSON
+	Evening   datatypes.JSON
+	Pleasant  datatypes.JSON
+	Reminders datatypes.JSON
+}
+
+type PlanWeek struct {
+	Date  datatypes.Date `gorm:"primaryKey"`
+	Items datatypes.JSON
+}
+
+type PlanMonth struct {
+	Date  datatypes.Date `gorm:"primaryKey"`
+	Items datatypes.JSON
+}