[llvm-branch-commits] [clang-tools-extra] [clangd] Add clangd 18 release notes (PR #84436)

[Nathan Ridge via llvm-branch-commits]

HighCommander4 wrote:

To prepare these, I went through the clangd commits in clangd 18 and made note of what seemed notable to me.

In some areas of the code that I'm less familiar with, I was somewhat vague (e.g. under "Diagnostics" I added "Improved quality of include-cleaner diagnostics (missing and unused includes)"; if someone more familiar with include-cleaner would like to expand on that with more specific improvements, that would be welcome).

https://github.com/llvm/llvm-project/pull/84436