[clang-tools-extra] [clangd] Add inlay hints for default function arguments and implicit lambda captures (PR #95712)

[Younan Zhang via cfe-commits]

zyn0217 wrote:

> To clarify, you mean hovering over the default capture '=' or '&' right?

Yep, that's what I thought.

> I'm happy to remove the lambdas from this PR in favor of the hover approach.

No worries, but let's wait for other reviewers' opinions before we move forward. :)

https://github.com/llvm/llvm-project/pull/95712