chore: add script to delete all build and vendor folders recursively

- delete all `node_modules` dirs
- delete all `.next` dirs
- delete all `out` dirs

scripts/delete-deps.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+rm -rf $(find . -type d -name "node_modules")
+rm -rf $(find . -type d -name ".next") # next build dir
+rm -rf $(find . -type d -name "out") # `next export` output dir