Bugfix release

More work towards Qt 6 support.
Some performance optimizations when reading files from disk.
Some code simplifications in IntervalModel
Remote control protocol now knows when an interval is being paused / resumed.
Control surfaces send more information through remote control protocol.
Fix bugs various bugs found since a25 was released.
Fix a bug with offset and scenarios with graph intervals.
Pure-Data plug-in: look for Purr-Data if available as editor.
Pure-Data plug-in: add an API to create UI controls in [r].
See the documentation: https://ossia.io/score-docs/docs/advanced/puredata.html

Provide feedback