Add Messaging card to API references page

[adityaoberai]

What does this PR do?

Adds Messaging card to API references page

Test Plan

• pnpm i && pnpm run dev

Related PRs and Issues

No

Have you read the Contributing Guidelines on issues?

Yes

[render[bot]]

Your Render PR Server URL is https://appwrite-io-docker-pr-991.onrender.com.

Follow its progress at https://dashboard.render.com/web/srv-cpb26m5jm4es73eavmq0.

[adityaoberai]

Local test