Release version 0.6.0

There have been quite a few changes since the 0.5.0 release that would probably be worth a 0.6.0 release. - #135 - #139 - #136 - #141 - #142 - #143 (breaking change) - #145 (breaking change) - #152 (breaking change) - #156 - #133 and #161 - importantly #164 (breaking change) - #166 - #168 - #169 - #171 - #172 - importantly #176 - #178 - #180 - importantly #188 - importantly #189 - #190 - #192 One thing that might be worth doing before pushing this would be to implement one of the solutions from https://github.com/messense/mupdf-rs/pull/149#issuecomment-2938681228 as otherwise mupdf-sys generates a lot of warnings on windows with rustc below version 1.89.0 (the latest stable version). Probably 0.5.0 should be yanked after, due to #142, #176 and #159 (technically even all versions except for 0.0.1 because of 054f619ae1ade50de05ee777c5a2f26832af100d)