Improve i3 configurations to work alongside Plasma

+ Add alias to restart plasmashell
+ Fix date display in conky for i3 sessions
+ Fix polybar height for better display with new font size
+ Add floating rules in i3 for Steam and Signal
+ Use i3 configuration to bind custom keys instead of xbindkeys
+ Relocate `.desktop` files to `.local/share/applications`
+ Symlink desktop files for startup applications to `.config/autostart`

.config/polybar/config

@@ -45,7 +45,7 @@ cursor-scroll = ns-resize
 monitor = ${env:MONITOR}
 bottom = true
 width = 100%
-height = 20
+height = 30
 
 ; Use top bar colors
 background = ${bar/top.background}