Write AppScript for Google Sheets

There is a sheet of applications for the transportation of goods (hereinafter - Applications).
 
It is necessary to organize the following functionality:
 
1. On the Applications sheet, implement 2 actions: “Create batch” and “Add to batch”:
 
1.1. When the “Create batch” button is pressed, the selected rows checked by the checkbox are moved to the next sheet (hereinafter - Batches) and a separate header is added to the list of these rows, while in the current sheet the row is highlighted in color and the checkbox is removed.
 
1.2. When the “Add to batch” button is pressed, the selected rows checked by the checkbox are prompted to select an already existing batch and are added to it, while in the current sheet the row is highlighted in color and the checkbox is removed.

2. On the “Batches” sheet, implement 3 actions: “Remove from batch”, “Send to manager” and “Confirm readiness”
 
2.1. When the “Remove from batch” button is pressed, the selected rows checked by the checkbox are removed from the current Batches sheet, and on the previous Applications sheet, the corresponding row loses its color and the checkbox appears.
 
2.2. When the “Send to manager” button is pressed, the selected batches checked by the checkbox are copied to a Google document template, this document is saved on the disk and sent to the corresponding email address (the dependency of the email address on the direction is indicated on a separate sheet), while the batch is highlighted in color and assigned the status “Packing”.

2.3. When the “Confirm readiness” button is pressed, the selected Batches checked by the checkbox (only certain columns and already without additional rows) are copied to the next sheet (hereinafter - Flights) and prompted to select a carrier from a dropdown list, while in the current sheet the row is highlighted in color, assigned the status “Ready for shipment”, the application moves down under “Unready batches” and the checkbox is removed.

3. On the “Flights” sheet, implement 2 actions: “Add carrier” and “Monitor”

3.1. When the “Add carrier” button is pressed (preferably, it should be implemented in all rows of flights), a row is added below the selected flight checked by the checkbox with the option to choose a second carrier from the list.

3.2. When the “Monitor” button is pressed, the row is copied to another table, highlighted in color and moves down under “Active flights” and the checkbox is removed.