Revert "Migrate from Geary to Evolution."

This reverts commit 29cef1b8.

TIL about app passwords in Google. Now I can use Geary again.

.config/autostart/geary.desktop

+[Desktop Entry]
+Name[en_US]=Geary
+Comment[en_US]=flatpak run org.gnome.Geary --hidden
+Exec=flatpak run org.gnome.Geary --hidden
+Icon=org.gnome.Geary
+X-GNOME-Autostart-enabled=true
+Type=Application