Make the name and duration in minutes of a Stretch customisable

[DC23]

The default name will still be Stretch, and the default duration will be 15 minutes. Allowing customisation within sensible limits for duration will allow use with other systems. For example:

• OSR games that use 10-minute dungeon turns but still break the day into 4 shifts of 6 hours each.

[DC23]

I already have a module setting for the amount of time that the small time skip button will adjust. It makes sense that this is linked to the duration of a game turn. This setting will be renamed, or at least the hint is changed to make the use clear. The value will be used not just for the time skip, but also in the calculations for the number of segments in the game turn clock - one click of the small skip button should always fill one clock segment. This value determines other derivative values - the number of game turns in an hour, a shift, and a day. Therefore, the choices must be fixed to values that evenly divide these larger time divisions:

• 5 minutes
• 10 minutes
• 15 minutes (default), 4 turns to an hour, 24 in a 6 hour shift.
• 20 minutes
• 30 minutes