Implement refactoring and navigation for secondary elements generated by `has` and `mk_accessor` methods

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Continuation of #2370

1. How to refactor
2. How to highlight usages

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For now it feels like we should refactor with dialog such things or provide reference range after resolve

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Seems that accessors or properties should be changed to some kind of multi-named subs.

1. They should provide completion elements
2. They should provide additional find usages
3. We should collect kind of call data from invocation and build light element around it.