Add tree-sitter related node support

[pokey]

• Adds @_.domain, @_.leading, @_.trailing, @_.removal, and @_.interior tree-sitter query captures
• Introduces @_.iteration tree-sitter query capture to allow indicating iteration scope for tree-sitter scope handlers
• Depends on Introduce tree-sitter queries for syntactic scopes #629

Checklist

• I have added tests
• I have updated the docs and cheatsheet
• I have not broken the cheatsheet

[pokey]

Factored out the core implementation of ContainingScopeStage so that EveryScopeStage could use it directly for expanding to containing iteration scope, because iteration scopes don't necessarily have a well-defined scope type, so it's easier if it can just pass in a scope handler rather than making a dummy scope type just for this purpose

[pokey]

the way this scope handler defines its iteration scopes got a bit more complex because its constituent scopes could use a custom iteration scope handler

[pokey]

For convenience, you can pass in a custom scope type. It's just as easy for the caller to grab the scope handler themselves, but the uniformity of just calling scopeHandlerFactory.create can make their life easier