Fix firing on its own and add optional reset inputs

[horoni]

Closes #13

It fixes several bugs of fast practice mode. The main change is that the behavior of fast practice now matches that of /spec. Please review this PR and I will fix founded issues.

Checklist

• Tested the change ingame
• Provided screenshots if it is a visual change
• Tested in combination with possibly related configuration options
• Written a unit test (especially base/) or added coverage to integration test
• Considered possible null pointers and out of bounds array indexing
• Changed no physics that affect existing maps
• Tested the change with ASan+UBSan or valgrind's memcheck (optional)
• I didn't use generative AI to generate more than single-line completions