Auto include headers code action

[fakedrake]

I looked around the internet and the documentation but I couldn't find a definite answer so this is either a use case question or a feature request: is a code action to include a missing system or library header available/easy to implement? Thank you and sorry if this channel is inappropriate

[iensen]

There is already an issue for this I believe: https://github.com/MaskRay/ccls/issues/530