[clang] [clang-tools-extra] [clangd] Show struct fields and enum members in hovers (PR #89557)

[Younan Zhang via cfe-commits]

https://github.com/zyn0217 commented:

Thank you! I have a few questions:
1) Do we want an RFC in discourse for the changes in `DeclPrinter`?
2) Do you think we should also add some test cases to `DeclPrinterTest.cpp`?

https://github.com/llvm/llvm-project/pull/89557