[clang-tools-extra] [clangd] Support symbolTags for document symbol (PR #113669)

[Dietrich Travkin via cfe-commits]

travkin79 wrote:

Hi @chouzz,
I found out that I get symbol tags if the LSP method [textDocument/publishDiagnostics](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_publishDiagnostics) is used. Could you please check your implementation if the symbol tags are only created for diagnostics? If that's the case, could you please add symbol tags also for the following LSP methods and LSP types?

Methods

* [textDocument.documentSymbol](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_documentSymbol)
* [workspace/symbol](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#workspace_symbol)
* [textDocument/prepareCallHierarchy](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_prepareCallHierarchy)
* [callHierarchy/incomingCalls](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#callHierarchy_incomingCalls)
* [callHierarchy/outgoingCalls](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#callHierarchy_outgoingCalls)
* [textDocument/prepareTypeHierarchy](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_prepareTypeHierarchy)
* [typeHierarchy/supertypes](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#typeHierarchy_supertypes)
* [typeHierarchy/subtypes](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#typeHierarchy_subtypes)

Types

* [DocumentSymbol](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#documentSymbol)
* [SymbolInformation](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#symbolInformation)
* [WorkspaceSymbol](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#workspaceSymbol)
* [CallHierarchyItem](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#callHierarchyItem)
* [TypeHierarchyItem](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#typeHierarchyItem)

https://github.com/llvm/llvm-project/pull/113669