Remove node_modules folder and add it to .gitignore

[walker84837]

I'm really not a JavaScript expert, but I'd be pretty sure that node_modules includes all dependencies.

[1arp]

Hi,
You are right that we shouldn't be committing in the node_modules folder but the way github actions work (downloading the project and running the script) we have to include the required dependencies.
That was the recommended way when I wrote this action. Now they recommend to bundle the required dependencies into a single file using bundlers.
If you create a PR for the bundler, preferably swc, I'd be happy to take a look at it.