Add sponsor section

[Eomm]

Prerequisites

• [X] I have written a descriptive issue title
• [X] I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

We must comply to our sponsorship program:

Add your logo (max-width: 100px), will be showcased on the official website Add your logo (max-width: 160px), will be showcased on the official website

Motivation

We have our first tier 3 sponsor:

https://github.com/fastify/fastify/pull/5424

Will work on it this weekend

Example

No response