Rework pricing page

[agjohnson]

This fixes up a number of content issues with the pricing page:

• Having two rows of plans with competing labels is confusing. It's not guiding the user towards "Read the Docs for Business" or "Base plans"
• The feature comparison is still really hard

Changes are:

• Add a tabbed segment for community and commercial plans, so we can limit what the reader is looking at
• Keep all plans listed above the fold
• Adds the big feature checklist we've wanted, so we can be less verbose above the fold
• Some technical fiddly bits to support tabbed segments that can be linked to
• Some technical CSS bits to make tablet display less bad

Last steps:

• [x] Go back over feature list icons and copy, and supporting text copy
• [x] Add analytics back in

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:books: Documentation preview :books:: https://read-the-docs-site-community--166.com.readthedocs.build/

[humitos]

It's looking great! 💪🏼

[ericholscher]

I love the feature table! Been wanting that for a long time.

I still have this old table kicking around if it's useful: https://docs.google.com/spreadsheets/d/1IP2DOHiIJQn5nsIyBh9jZGv_HJcBMZtIiJJMyevNzG8/edit#gid=0

[agjohnson]

I was using the (archived?) version here: https://github.com/readthedocs/policy/blob/main/pricing.csv

[ericholscher]

Ah yea, I think is an export of it :)

[agjohnson]

A put a few of these on the later polish list, #167, and we can revisit them later with some more usage on this page.

[ericholscher]

Happy to ship this 👍