Add a Makefile that runs Meson, for easier transition

[dimkr]

[orbea]

I suggest that ninja is not hardcoded. Users could also use samu from the samurai project which is fully viable.

https://github.com/michaelforney/samurai

[dimkr]

@orbea Isn't ninja a symlink to samu in Alpine? :thinking:

[orbea]

I don't know about Alpine, but it is not a symlink in Slackware. Slackware current by default uses ninja, but it allows setting NINJA=samu as an environment variable. Ideally they should be able to coexist on the same system, but that is not perfect in regards to meson where configure will find ninja first and I will use samu...