chore(shell): remove eza

Drop the ls/tree eza aliases, swap the two fzf directory previews to a
portable 'ls -la', and delete the install-eza installer.

lk-installers/install-eza

@@ -1,17 +0,0 @@
-#!/bin/bash
-
-# Check if Eza is installed
-
-if dpkg-query -Wf'${db:Status-abbrev}' eza; then
-  sudo apt install -y eza
-else
-  sudo apt update
-  sudo apt install gpg
-  sudo mkdir -p /etc/apt/keyrings
-  wget -qO- https://raw.githubusercontent.com/eza-community/eza/main/deb.asc | sudo gpg --dearmor -o /etc/apt/keyrings/gierens.gpg
-  echo "deb [signed-by=/etc/apt/keyrings/gierens.gpg] http://deb.gierens.de stable main" | sudo tee /etc/apt/sources.list.d/gierens.list
-  sudo chmod 644 /etc/apt/keyrings/gierens.gpg /etc/apt/sources.list.d/gierens.list
-  sudo apt update
-  sudo apt install -y eza
-fi
-