Internal: Update build and create NPM package [ED-7724]

[yotamselementor]

This PR does the following:

• Updates the build process to stop using Grunt
• Updates the node modules
• Creates a node module as the output of the build process instead of storing the build results in Git
• No longer adds a banner to the minified CSS file since we now get the version from the node module

[matipojo]

You are using many versions of this action (0.3.0, v1, v4) is there a reason for it? If so, please explain in code in comments.

[yotamselementor]

The prerelease/release scripts should be reviewed/rewritten by @chenele & her team

[matipojo]

@chenele can you take a look?

[chenele]

not sure we want this pre-release action on a public repository. everyone will be able to publish new packages, doesnt make much sense.
we need the pre-release appraoch as Manual action that will be executed on demand by developers

[yotamselementor]

Done: 0db1e5c