[Portal] Fix: Added Nebula FAQ (#6085)

NEB-82

## Notes for the reviewer

Documentation changes

## How to test

No testing needed

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## PR-Codex overview
This PR adds information about the contracts supported by `Nebula` and provides guidance on enabling deployment for published contracts. It also updates the section on pricing options, ensuring consistency in the text.

### Detailed summary
- Added a new section titled "Which contracts does Nebula support?" detailing supported contract types.
- Included links to `Token - ERC20`, `NFT Collection - ERC721`, `Edition - ERC1155`, and `Split` contracts.
- Provided a contact link for enabling published contracts for deployment.
- Updated the `Pricing` section for clarity, removing the newline at the end.

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Author: saminacodes

apps/portal/src/app/nebula/faqs/page.mdx

@@ -4,6 +4,11 @@
 
 We are rolling out Nebula approval in batches daily - stay tuned! 
 
+### Which contracts does Nebula support?
+Nebula supports the read and write context of any verified contract or any contract on the thirdweb dashboard. For deploying through Nebula, supported contracts include [Token - ERC20](https://thirdweb.com/thirdweb.eth/TokenERC20), [NFT Collection - ERC721](https://thirdweb.com/thirdweb.eth/TokenERC721), [Edition - ERC1155](https://thirdweb.com/thirdweb.eth/TokenERC1155), and [Split](https://thirdweb.com/thirdweb.eth/Split) contracts. 
+
+If you have a published contract you would like to enable for deployment through Nebula, please [contact us](https://thirdweb.com/contact-us). 
+
 ### Does Nebula have memory from past conversations?
 Nebula retains memory within the confines of a session.
 
@@ -16,4 +21,4 @@ Nebula is not currently open source. We are exploring open sourcing Nebula in th
 
 ### When will pricing be available for Nebula?
 
-Pricing options will be available in beta. Nebula is still being tested in alpha.
+Pricing options will be available in beta. Nebula is still being tested in alpha.