Added zellij auto updater

zellij

@@ -0,0 +1,16 @@
+#! /usr/bin/env bash
+
+set -e
+
+ZELLIJ_PATH="${ZELLIJ_PATH:-$(which zellij.latest)}" || true
+[[ -n "${ZELLIJ_PATH}" ]] || ZELLIJ_PATH="$HOME/bin/zellij.latest"
+
+if [[ ! -x "${ZELLIJ_PATH}" || -n "$UPGRADE" ]]; then
+    [[ -d /tmp/zellij ]] && rm -fR /tmp/zellij* ]]
+    bash <(curl -qsL zellij.dev/launch) --help > /dev/null
+    cp /tmp/zellij/bootstrap/zellij ~/bin/zellij.latest
+fi
+
+[[ -x "${ZELLIJ_PATH:?"Can't find zellij executable"}" ]]
+
+exec $ZELLIJ_PATH "${@}"