Update tmux copy and selection behavior

+ Enable vim copy selection mode
+ Add various copy actions for middle, double, triple-click, etc.
+ Add instructions to README to install required tmux plugins

.bash_aliases

@@ -1,11 +1,14 @@
-# Alias to restart plasmashell for Kubuntu Plasma session
-alias kapp-plasmashell='sudo pkill plasmashell && plasmashell --replace &> /dev/null &'
-
 # Aliases to use the correct python version
 alias python3='python3.9'
 alias pip3='python3.9 -m pip'
 
+# Alias to restart plasmashell for Kubuntu Plasma session
+alias kapp-plasmashell='sudo pkill plasmashell && plasmashell --replace &> /dev/null &'
+# Alias to clear swap
+alias kapp-swap='sudo swapoff -a && sudo swapon -a'
+# Alias to initialize github user
 alias kapp-git='git config --global user.name "Shaun Reed" && git config --global user.email "shaunrd0@gmail.com"'
+# Alias to update and upgrade with useful flags set
 alias kapp-update='sudo apt update -y && sudo apt upgrade -y && sudo apt upgrade --fix-broken --fix-missing --auto-remove'
 
 # Alias / export customizations