Improvement: Generate version.h which would provide version string and version numbers

Example

// NOTE: Following defines are Automatically Defined by the Build System (meson.build)
// BUILDMASTER_VERSION_MAJOR
// BUILDMASTER_VERSION_MINOR
// BUILDMASTER_VERSION_MICRO
// MESON_BUILD_TEMPLATE_PATH

#define BUILDMASTER_VERSION_ENCODE(major, minor, micro) (((major) * 10000) + ((minor) * 100) + ((micro) * 1))
#define BUILDMASTER_VERSION BUILDMASTER_VERSION_ENCODE(BUILDMASTER_VERSION_MAJOR, BUILDMASTER_VERSION_MINOR, BUILDMASTER_VERSION_MICRO)

#define BUILDMASTER_VERSION_XSTRINGIZE(major, minor, micro) #major"."#minor"."#micro
#define BUILDMASTER_VERSION_STRINGIZE(major, minor, micro) BUILDMASTER_VERSION_XSTRINGIZE(major, minor, micro)
#define BUILDMASTER_VERSION_STRING BUILDMASTER_VERSION_STRINGIZE(BUILDMASTER_VERSION_MAJOR, BUILDMASTER_VERSION_MINOR, BUILDMASTER_VERSION_MICRO)