Add CLA signing and verification

[cb1kenobi]

This PR adds the CLA form (or link to download signed CLA) to the Contributors page. In addition, it also provides a REST API endpoint for the CLA status check to verify that the user has signed the CLA. The signed PDF and metadata files are stored on Google Cloud Storage.

This PR also updates dependencies and cleans up global styles.

[m1ga]

left some comments

[m1ga]

Just a quick thought:

Maybe add another div around the pages in contribute.tsx line195 and make it height:700px, overflow:auto;border-radius:5px ?

[cb1kenobi]

I tried setting a height and it was horrible on mobile.

[m1ga]

you can use something like 80vh so it will be 80% of the viewport height in combination with min-height: 500px to give it a minimum in case you use your phone horizontal.

[cb1kenobi]

I don't agree with the border radius. It's unnecessary.

I don't agree with the capping the height. Like I implied, I already went down this road. Scrolling complicates UX. it complicates printing. It complicates the mobile experience. I wouldn't be surprised if if the scrolling complicated the overlayed field scaling. Remember, this is an agreement page. It's not a PDF viewer.

[m1ga]

you are right, was overthinking it 😄 Should be quickly for the user and not make more steps then needed 👍

[cb1kenobi]

Here's the PR for the CLA action that uses the new API endpoint: tidev/tidev-cla-action#3.

[cb1kenobi]

Let's go!