Add `get` & `decrease` strikes commands

[CarrotManMatt]

After #42 is complete, these commands should be implemented (in case of errors like increasing strikes number accidentally)

[MattyTheHacker]

@CarrotManMatt you doing this or do you want me to? should be reasonably simple to implement

[CarrotManMatt]

Happy to be reassigned

[MattyTheHacker]

yoinked