multimedia: Add simple imv configuration

Added simple configuration for the imv image viewer which is
wayland-compatible. Nothing too fancy but some simple
vim-like mappings are set, as well as some styling applied.

multimedia/.config/imv/config

@@ -0,0 +1,20 @@
+[options]
+background = #080808
+overlay = false
+overlay_position_bottom = true
+overlay_font = monospace:12
+overlay_text_color = #c6c6c6
+overlay_background_color = #1c1c1c
+overlay_background_alpha = ff
+
+[binds]
+n = next
+p = prev
+o = overlay
+<Shift+K> = zoom 5
+<Shift+J> = zoom -5
+<Shift+R> = rotate by 90
+z = flip horizontal
+<Shift+Z> = flip vertical
+y = exec wl-copy "$imv_current_file"
+Y = exec wl-copy < "$imv_current_file"