Try to add a desktop file

KShare.desktop

@@ -0,0 +1,15 @@
+[Desktop Entry]
+Name=KShare
+Comment=A ShareX inspired cross platform screen capture utility written with Qt.
+GenericName=Screenshot Capture Utility
+Exec=/usr/bin/kshare
+Icon=/usr/share/pixmaps/kshare.png
+Type=Application
+StartupNotify=false
+Categories=Qt;Utility;
+StartupWMClass=KSharee
+Actions=StartInBackground
+
+[Desktop Action StartInBackground]
+Name=Start without showing the window
+Exec=kshare -b

packages/arch/KShare/PKGBUILD.sample

@@ -24,5 +24,9 @@ package() {
   cd "${srcdir}/KShare"
   mkdir -p "$pkgdir/usr/bin"
   install ./KShare "$pkgdir/usr/bin/kshare"
+  mkdir -p "$pkgdir/usr/share/pixmaps"
+  install "${srcdir}/KShare/icons/icon.png"
+  mkdir -p "$pkgdir/usr/share/applications"
+  install KShare.desktop "$pkgdir/usr/share/applications"
 }