New crop calendar dates

[gnodnooh]

New crop calendar is being implemented on FDW side. As results, the following columns will be added.

• planting_start_date
• planting_end_date
• harvest_start_date
• harvest_end_date
• vegetative_start_date
• vegetative_end_date
• reproductive_start_date
• reproductive_end_date

[gnodnooh]

These metadata has been implemented with None values, expecting it will take a time to determine/validate data.