Add extended support column

[marcwrobel]

This PR is used to test the addition of a new "Extended support" column (as seen in https://github.com/endoflife-date/endoflife.date/pull/1254/files#r884229115).

TODO :

• Initial POC
• Support extended support in Calendar
• Document the new fields
• Decide if EOLed cycles that are in the extended support phase must be disabled or not.

[marcwrobel]

@captn3m0, @Evernow, is this what you had in mind: https://deploy-preview-2157--endoflife-date.netlify.app/rhel ?

[marcwrobel]

I think when this column is used it should be clearly stated in the product description that this "extended support" is not free (and the conditions to obtain it).

And maybe the text in the table should be a little bit different (italic, lighter font size...) ?

[captn3m0]

The preview looks good, but not so sure about the API: https://deploy-preview-2157--endoflife-date.netlify.app/api/rhel.json

I wanted to have column level customization, so we could do:

columns:
- release: {template: releaseLabel}
- releaseDate {type: date}
- support: {type: BooleanOrDate}
- eol: {type: BooleanOrDate}
- extended: {type: BooleanOrDate}
- latestVersion: {template: changelogTemplate}

This would have helped with moving around our columns.

But looking at the simplicity of this PR, I think this is a much simpler way. We can add more customization when we move our logic from liquid to Ruby separately.

[captn3m0]

This will need changes to the calendar as well.

[marcwrobel]

This will need changes to the calendar as well.

You are right, completely missed it ! I added a todo list in the PR description.

[marcwrobel]

I wanted to have column level customization, so we could do:
...
This would have helped with moving around our columns.

@captn3m0, sorry, I do not understand. I think I am confused by the  BooleanOrDate mentions. This new columns attribute is at the product or releases level ?

[marcwrobel]

@captn3m0, on more thing I just noticed : should latest date be disabled when there is still extended support (example : cycle 6 on https://deploy-preview-2157--endoflife-date.netlify.app/rhel) ?

I would say no but I prefer to ask first.

[marcwrobel]

Calendar support added: labels can be improved, it will be done in #2171.

Extended support dates are automatically showed in the API, nothing to do.

[captn3m0]

The column idea came from #404, just noting it down here, since it's relevant. Don't think we need to go down that path for now. We just have to be sure of the semantics.

[marcwrobel]

Think this PR is ready for a proper review.

We can list products that needs to be modified in a separate issue.

[captn3m0]

LGTM. Can we make a list of other pages where this might be useful?

[marcwrobel]

Conflicts resolved.

[marcwrobel]

LGTM. Can we make a list of other pages where this might be useful?

Just opened #2246 for that: I prefer not to block this PR for that. I let you merge if you think it's ok.