build: Added option to generate vapi
Fixes #49 (closed)
Adds a meson option vapi
, that is disabled by default (If you really need the vapi you can either compile GHex yourself or do something like vapigen src/Hex-4.gir --library hex --pkg gtk4
in the meson build dir.
It will complain loudly, if you want to generate a vapi without generating GIR, as it is a prerequisite