[sway] add gaps inc/decr to resize mode

overlays/sway/etc/skel/README.md

@@ -65,6 +65,8 @@ Sway has up to ten different workspaces that can be freely arranged on the avail
 After activating the Resize Mode you should see a message in the statusbar.
 
 - resize the current application window: **\<movement-key\>**
+- increase the gaps between windows: **+**
+- decrease the gaps between windows: **-**
 - exit the resize mode: **Enter** or **ESC**
 
 ## Scratchpad Mode

overlays/sway/etc/sway/modes/resize

@@ -17,6 +17,12 @@ mode "resize" {
     bindsym Up resize shrink height 10px
     bindsym Right resize grow width 10px
 
+    ## Resize // Window Gaps // + - ##
+    bindsym minus gaps inner current minus 6
+    bindsym plus gaps inner current plus 6
+    bindsym Shift+minus gaps inner current minus 12
+    bindsym Shift+plus gaps inner current plus 12
+
     # Return to default mode
     bindsym Return mode "default"
     bindsym Escape mode "default"