Support for meson-python

[tobiasdiez]

If you have a python project that uses meson as its build backend, then the vscode is not able to find the meson configuration. By default, it is a folder of the form build/cp<python version>. As the build folder depends on the python version, it is hard to use the mesonbuild.buildFolder setting to reliable find it (different devs may use different python versions).

A bit related: #233 #74

[trim21]

this also including not warning about built-in options python.allow_limited_api

project(
    '...',
    'c',
    default_options: [
        'c_std=c11',
        'buildtype=release',
        'debug=false',
        'python.allow_limited_api=false',
    ],
    meson_version: '>= 1.5.0',
)

allow_limited_api = get_option('python.allow_limited_api')