doc: develop: tools: add VS Code setup guide

This basic guide only covers linting so far. It could be expanded in the
future to be more accurate and detailed. The current configuration
allows to navigate the code but some symbols are not recognized by the
linter, and the native compiler is always used.

Co-authored-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@savoirfairelinux.com>
Co-authored-by: Luc BEAUFILS <luc.beaufils@savoirfairelinux.com>
Signed-off-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@savoirfairelinux.com>
Signed-off-by: Luc BEAUFILS <luc.beaufils@savoirfairelinux.com>