install: add fancy install script

install.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+ensure_has() {
+    if ! command -v "$1" > /dev/null; then
+        echo "Can't find $1."
+        exit 1
+    fi
+}
+
+ensure_has fdfind
+ensure_has fzf
+ensure_has install-script
+
+fdfind -t x \
+    | fzf -m --layout=reverse \
+    | while read -r script; do install-script "$script"; done