[WIP] Lint javascript for license header and add licence to js files

[jveldhuijzen]

Adds license header files to javascript and lints the javascript files.
Fixes #1

[thc202]

It has the year as token.

[thc202]

This should be reverted.

[thc202]

Changed to WIP per above comments.

[thc202]

@jveldhuijzen do you still plan to work on this?

[jveldhuijzen]

Well.. it's been busy. Where I left this off was that the lib used to to the linting (and fixing the header) wasn't able to do a replacement of the $year variable.
I was busy with extending that lib (eslint-plugin-license-header) and wanted to setup a PR for them but all the unit tests for that project kept failing on my W10 machine, and I was planning on trying this out in a linux vm to see what would happen there.

So yeah, I'll try that project out in a linux vm to see where it leads me with the unit testing.
I'll report back soon.

[thc202]

Thank you.

[jveldhuijzen]

As you may've wondered, I'm not getting around fixing this the right way. So I'll leave this PR for someone else to continue upon or do you guys want to close this?
Running the test for that other project does work on a linux machine, not a Windows machine.

[nothingismagick]

Its funny, I've been looking for something like this for JS (after building it in rust over at https://github.com/tauri-apps/tauri ) - I have a couple cycles free this week and can pick this one up if you like @thc202

[thc202]

That sounds good to me, I guess you would have to create a new PR (as you'll not be able to change this?). We can leave it open in the meantime though.

[nothingismagick]

Would you prefer a proper SPDX approach? If so, who is the exact copyright holder?

[thc202]

I don't think it needs to be but if it addresses the issue. We go with "The ZAP Development Team".