Switch from tmux to zellij

Also remapped some nvim and zsh keybinds to not conflict with zellij

home/.config/zsh/01-zellij.zsh

@@ -0,0 +1,9 @@
+if [[ -z "$ZELLIJ" ]]; then
+  # Launch or attach to existing session if logging in over ssh
+  if [[ -n "$SSH_CONNECTION" ]]; then
+    exec zellij attach -s SSH
+  # Launch a new local session otherwise
+  else
+    exec zellij
+  fi
+fi