Use meson instead of autoconf/automake

Hopefully I got this right, reviews welcome.

This is the generated pkgconfig file:

pkgdatadir=/usr/local/share/mobile-broadband-provider-info
database=${pkgdatadir}/serviceproviders.xml

Name: mobile-broadband-provider-info
Description: Mobile Broadband Service Provider Information Database
Version: 20230416

and the tarball contents

drwxr-xr-x foo/foo           0 2023-10-26 14:17 mobile-broadband-provider-info-20230416/
-rw-rw-r-- foo/foo         167 2023-10-26 14:16 mobile-broadband-provider-info-20230416/.gitignore
-rw-rw-r-- foo/foo         321 2023-10-26 14:16 mobile-broadband-provider-info-20230416/.gitlab-ci.yml
-rw-rw-r-- foo/foo         259 2023-10-26 14:16 mobile-broadband-provider-info-20230416/CONTRIBUTING
-rw-rw-r-- foo/foo        1623 2023-10-26 14:16 mobile-broadband-provider-info-20230416/COPYING
-rw-rw-r-- foo/foo         226 2023-10-26 14:16 mobile-broadband-provider-info-20230416/MAINTAINERS
-rw-rw-r-- foo/foo        1421 2023-10-26 14:16 mobile-broadband-provider-info-20230416/README
-rw-rw-r-- foo/foo        4608 2023-10-26 14:16 mobile-broadband-provider-info-20230416/apns-conf.xsl
-rw-rw-r-- foo/foo        1281 2023-10-26 14:16 mobile-broadband-provider-info-20230416/meson.build
-rw-rw-r-- foo/foo        1697 2023-10-26 14:16 mobile-broadband-provider-info-20230416/mobile-broadband-provider-info.doap
-rw-rw-r-- foo/foo        5592 2023-10-26 14:16 mobile-broadband-provider-info-20230416/serviceproviders.2.dtd
-rw-rw-r-- foo/foo      356193 2023-10-26 14:16 mobile-broadband-provider-info-20230416/serviceproviders.xml