[website] Add enterprise plan

[prakhargupta1]

• Added a 4th column for 'Contact Sales'
• Tweaked plan descriptions
• Support section:
  • Premium: Removed all WIP signs, changed 2 business day -> 72 hours
  • Enterprise: Describes priority support

To Do

• update icon color
• update docs
• add support row head logo
• fix right border
• Over flowing support row titles
• Add priority support link from Premium plan

Preview: https://deploy-preview-44267--material-ui.netlify.app/pricing/

[oliviertassinari]

Initial design of the pricing page https://www.figma.com/design/famD2DnZkd1G4vacqXGCi8/%5BARCHIVE%5D-Balkan-Brothers-Iteration?node-id=2615-11234&node-type=canvas&t=eRWxKKtKruaPloDl-0 for context.

1. We could change to this:

to reduce the font-size from 14px to 13px and move the description away from the action button, making the pricing page feels a bit lighter.

2. We should either use business/working days in the cell or in the tooltip explain that those durations are for business/working days

3. We should see the price of priority support on the pricing page.
4. It feels like we should be able to easy see what priority support gives on the pricing page. We could move this info to the next page but from the UX of, e.g. Kendo UI pricing page, it feels great to be able to quickly figure out what this gives you. it's a bit hidden in the tooltip, I didn't think about checking it.
5. Maybe a design opportunity here?

6. Nonbreaking space missing:

7. Priority add-on for the Pro plan. Pro is about the ease of use with the rest of the framework, Premium is about rich features that don't exist in the open-source. So ok, why not. But also no objection to not do it.
8. Priority add-on is missing issue escalation, I think it's a large part of the value of this.
9. Guaranteed response time for Premium. I think it should be 48 hrs. 72 doesn't feel right.
10. Enterprise plan. If we do this, I think that we should list new features on the pricing page, things that we would want to offer, and gauge the interest, before, one day, make this price publicly listed. I think the value of the Enterprise plan is to make Premium not the most expensive plan, to test those ideas, and to make it easier to find the contact sales link. Ideas for things that we could add: https://www.notion.so/mui-org/mui-x-Pricing-changes-2024-e5e32b7e0f9f4fbdb34afd7f6efede49?pvs=4#124cbfe7b6608066bbdefc936134f014. On the cons of having it, to be carefully that it can make the Pro plan less appealing.