Support textEdits on type hints

[lnicola]

Added in Code 1.60:

The InlayHint type can now have an optional, lazy textEdits property. Inlay hints that have edits set to them will apply them on double-click. The textEdits should be used to make the edits that are needed to make the inlay hint obsolete. For example, double clicking a hint representing an inferred type should insert that type annotation.

[lowr]

Oh I didn't notice this issue until now. Text edits for top-level bind_pat and closure_return hints have been implemented in #14533 (cc #13812). It might make sense to provide edits for fn_lifetime_fn and implicit_static but not sure how useful they would be.

[Veykril]

I think it would make sense to generally have them for all hints that are actual valid syntax (even if they aren't too useful in some cases)