Plugin API: Add MU4 properties, elements, and enums

[XiaoMigros]

Resolves: #28478
Resolves: #28476

Requires #28502 to build.

Following Changes have been made to the plugin API:

• The code style has been updated to more closely match the rest of the engraving module.

• All new element types and properties since 4.X have been made accessible to plugins.

• Many more enums are now exposed (and declared!), facilitating working with various property types.

• A Cursor now has a .staff property (read and write), rather than previously just the staffIdx.

• I signed the CLA

• The title of the PR describes the problem it addresses

• Each commit's message describes its purpose and effects, and references the issue it resolves

• If changes are extensive, there is a sequence of easily reviewable commits

• The code in the PR follows the coding rules

• There are no unnecessary changes

• The code compiles and runs on my machine, preferably after each commit individually - Yes, with Move some types out of dom to dedicated file #28502

• I created a unit test or vtest to verify the changes I made (if applicable)