meson: improve summary of auto-detected features

The summary of auto-detected features prints a boolean for every option to tell the user whether or not the feature has been auto-enabled or not. This summary can be improved though, as in some cases this boolean is derived from a dependency. So if we pass in the dependency directly, then Meson knows to both print a boolean and, if the dependency was found, it also prints a version number. Adapt the code accordingly and enable `bool_yn` so that actual booleans are formatted similarly to dependencies. Before this change: Auto-detected features benchmarks : true curl : true expat : true gettext : true gitweb : true iconv : true pcre2 : true perl : true python : true And after this change, we now see the version numbers as expected: Auto-detected features benchmarks : YES curl : YES 8.14.1 expat : YES 2.7.1 gettext : YES gitweb : YES iconv : YES pcre2 : YES 10.44 perl : YES python : YES Note that this change also enables colorization of the boolean options, green for "YES" and red for "NO". Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>