Additional information about read/write access in the Call Hierarchy Item

A call hierarchy item containing information about the access method to the referenced object would improve clarity, especially in multithreaded scenarios.

For example, in the Eclipse-CDT Plugin, this feature is represented with symbols showing read and/or write access:

In the example we are looking for the call hierarchy of the field fooInt. As result we see that 3 items are tagged with symbols describing the kind of access: HasRefs::foo() writes to fooInt, HasRefs::fooSome() reads from fooint and the ctor HasRefs::HasRefs reads and writes to/from fooInt.

Information about Read/Write access is also helpful when searching for references on variables/fields and is part of this issue.

Related suggestion for the LSP specification https://github.com/microsoft/language-server-protocol/pull/2226
Related clangd PR https://github.com/llvm/llvm-project/pull/172462

Start by reading the issue's related language-server-protocol PR #2226 and clangd PR #172462, then review how call hierarchy items and references are represented in this specification. Done should define a protocol-level way to expose read/write access for both call hierarchy items and variable or field references.