Merge Request: Better C++ language server and Visual Studio Code support.

Hello,

the OpenFOAM C++ source code is large and complicated. Code navigation tools like ccls can make it easier by providing a working "Go to Definition" function. Therefore, I am suggesting applying the patch below to help setting up ccls with vscode and openfoam.

mypatch8.patch

See https://openfoamwiki.net/index.php/HowTo_Use_OpenFOAM_with_Visual_Studio_Code for more information

(Yes I know, this should be a merge request, not an issue, but I cannot create merge requests)

For other OpenFOAM versions: bearOpenFOAM8.patch bearOpenFOAM7or6.patch

Older version:

mypatch7.patch mypatch6.patch mypatch5.patch mypatch4.patch mypatch3.patch mypatch2.patch mypatch.patch