Remove qmake

[karliss]

Your checklist for this pull request

• I've read the guidelines for contributing to this repository
• I made sure to follow the project's coding style
• I've updated the documentation with the relevant information (if needed)

Detailed description

• Remove qmake build script
• Define values that were previosuly read from qmake project directly in cmake project
• Remove meson. It was also reading values from qmake project. Previously it was tested only on windows and for a while on no other platforms.
• Update documentation

Test plan (required)

• Nothing in CI is broken

Closing issues

Closes #2545

[XVilka]

Probably worth also to remove .travis.yml.disabled too. We might instead add the test builds for the ARM64, PPC, SystemZ instead but later, once Rizin is all green on all of these.

https://github.com/rizinorg/rizin/blob/dev/.travis.yml

[xarkes]

Is it really useful to have CUTTER_VERSION_FULL as it can be reconstructed with the other defines?

[xarkes]

Well whatever, doesn't matter.

[karliss]

Yes, I consider it useful to have one place doing the gluing together instead of having 5 places copy pasting the same expression all over the place unless they have very specific needs.

Slightly related but offtopic for this PR is that in the versioning we should better distinguish between proper release versions and local or CI devbuilds. Both in package names and displayed version strings. At that point we might have additional suffix like "rc-n" or "-git-hash" in VERSION_FULL although some places need only the number part.