Add means to denote features as frozen

[sftim]

This is a Feature Request

What would you like to be added
We can denote features as alpha, beta, generally available, or deprecated. That's it. For example, we have a feature state shortcode.

Add a way, visually similar to feature state, that allows marking a feature as frozen.

Why is this needed
kubernetes/enhancements#4572 (comment) suggests we will have a frozen feature, and this may be a project first.

Comments
/area web-development
/kind feature

If you've already worked on similar web development work and would be willing to mentor a contributor who hasn't, this issue could be a good opportunity to do that.

[dipesh-rawat]

Would be nice to add this feature.

/priority backlog
/triage accepted

[dipesh-rawat]

I'm happy to assist anyone interested in contributing to this feature request.

[dev-johnn]

I'm exploring how website works using Hugo and also checking out shortcodes. I'm interested in trying this out.

/assign

[dev-johnn]

I'm happy to assist anyone interested in contributing to this feature request.

@dipesh-rawat I will reach out on Slack for some help with this.

[dipesh-rawat]

@dev-johnn How's this work going? Feel free to reach out if you need any assistance!

[dev-johnn]

Apologies, got little busy. Now i will be able to dedicate time for open source.
Let me first try this. Will definitely reach out if I need help @ dipeshrawat.