file types wishlist

[uprego]

In QColor KTreemapView::tileColor(1): https://github.com/jeromerobert/k4dirstat/blob/d94cab5afa9b53f408949dfaedb1319465bd2e2b/src/ktreemapview.cpp#L405

plz consider 7z (archive): https://github.com/jeromerobert/k4dirstat/blob/d94cab5afa9b53f408949dfaedb1319465bd2e2b/src/ktreemapview.cpp#L454-L470

plz consider ogg (audio), opus (audio): https://github.com/jeromerobert/k4dirstat/blob/d94cab5afa9b53f408949dfaedb1319465bd2e2b/src/ktreemapview.cpp#L506-L511

plz consider mp4 (video), mkv (video): https://github.com/jeromerobert/k4dirstat/blob/d94cab5afa9b53f408949dfaedb1319465bd2e2b/src/ktreemapview.cpp#L511-L522

plz consider iso (disc image), img (disc image), part (split files), vdi (VirtualBox virtual disk): https://github.com/jeromerobert/k4dirstat/blob/d94cab5afa9b53f408949dfaedb1319465bd2e2b/src/ktreemapview.cpp#L535-L540

thanks for your time and consideration!