build: use -1 and -1.0 suffix consistently

Change the meson build to be consistent with the autotools build:

• libraries must be named libcpml-1 and libadg-1
• headers must be installed under $prefix/include/adg-1
• pkgconfig files must be named cpml-1.pc and adg-1.pc
• anything gobject-introspection related uses the -1.0 suffix, e.g. Adg-1.0.gir and Cpml-1.0.typelib