Create new subclass Civilian that inherits from Ship. A Civilian ship should be different from a regular Ship by having an extra functionality where one hit on any of its squares sinks the rest of its squares immediately.

• Edit the model to incorporate inheritance with the ship class(parent)

• Remove Cruiser and Destroyer ship types

• Add a stealth trait to the military class

• Give the Battleship and Submarine types a stealth capability

• Copy Ship class scan function to Military class.
• Alter scan function to check if a military ship has stealth.

• have all ships' ending squares satisfy their length requirement, i.e. aircraft is 5 squares long, so starting square should be at 1 and ending square should be at 5, etc.
• fix tests accordingly
• fix ship method that retrieves a ship's squares accordingly

• Change instructions to include military stealth ships and civilian one-hit ships
• Modify dropdowns to be able to place dinghy and clipper, and take off unused military ships

• fix tests that currently break
• update test coverage to get 90%+ in all files
• do tests for civilian ships

Ideally, these tests should shoot at a civilian ship, then check if the implementation was correct by verifying that the rest of the ship squares are marked off when the ship is hit.