add script to download landing page deps

tools/dl_invites_page_deps.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 <install_dir>"
+    exit 1
+fi
+install_dir="$1"
+
+mkdir -p "$install_dir/jquery"
+curl -s -o "$install_dir/jquery/jquery.min.js" https://code.jquery.com/jquery-3.7.1.min.js
+
+curl -L -s -o /tmp/bootstrap4.zip https://github.com/twbs/bootstrap/releases/download/v4.6.2/bootstrap-4.6.2-dist.zip
+unzip -d "$install_dir" /tmp/bootstrap4.zip
+mv "$install_dir/bootstrap-4.6.2-dist" "$install_dir/bootstrap4"
+rm /tmp/bootstrap4.zip
+echo "landing page dependencies for mod_invites installed to $install_dir"