Allow StaffTypeChange to be assigned to any tick, not just beginnings of measures

Your idea

I would like to be able to assign a StaffTypeChange to any tick, including the middle of measures.

Problem to be solved

This would facilitate a number of possibilities, including stemless passages that aren't locked to barlines. But probably the most important for me is the ability to change the number of staff lines mid-measure for cues, especially in percussion parts. Here is an example from Finale:

Prior art

Finale has staff styles which encompass most of the features included in StaffTypeChange (along with many others). Almost all staff style options can be assigned to start and end at any point in a measure.

Additional context

No response

Checklist

• This request follows the guidelines for reporting issues
• I have verified that this feature request has not been logged before, by searching the issue tracker for similar requests

No files or tests are identified. Start by locating StaffTypeChange and the logic that restricts its assignment to measure beginnings, then inspect existing tests for staff-type changes. Done means StaffTypeChange can be assigned at any tick, including mid-measure, with the requested cue and stemless use cases supported.