Expand FAQ with Dedicated Relayer FAQs (#8585)

Added information about gas sponsorship and dedicated relayer features.

<!--

## title your PR with this format: "[SDK/Dashboard/Portal] Feature/Fix: Concise title for the changes"

If you did not copy the branch name from Linear, paste the issue tag here (format is TEAM-0000):

## Notes for the reviewer

Anything important to call out? Be sure to also clarify these in your comments.

## How to test

Unit tests, playground, etc.

-->

<!-- start pr-codex -->

---

## PR-Codex overview
This PR introduces new content related to `Gas Sponsorship` in the `page.mdx` file, adding FAQs about the dedicated relayer service offered by thirdweb.

### Detailed summary
- Added a new section titled `Gas Sponsorship`.
- Included multiple FAQs regarding the dedicated relayer:
  - Its status as an add-on service.
  - Expected performance benchmarks.
  - Comparison to other alternatives.
  - Management of scaling on multiple relayer instances.
  - Transaction handling capacity.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

<!-- end pr-codex -->

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

* **Documentation**
  * Expanded wallets FAQ with a new "Gas Sponsorship" section covering dedicated relayer plan/pricing, throughput benchmarks for single vs. multi-executor setups, comparisons with alternative queue approaches, scaling guidance for multiple relayer instances, and transaction-per-second expectations. Reordered content so Gas Sponsorship appears before Security & Recoverability; Ecosystem Wallets content retained.

<sub>✏️ Tip: You can customize this high-level summary in your review settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: saminacodes

apps/portal/src/app/wallets/faq/page.mdx

@@ -53,14 +53,42 @@ export const metadata = createMetadata({
 	However, you will need to provide a separate flow to create in-app wallets as you would with any wallet provider (WalletConnect, Coinbase Wallet, etc.).
 </Details>
 
-## Server Wallets
-
 ## Ecosystem Wallets
 
 <Details summary="Can I edit my Ecosystem Wallet name and icon after it is created?">
 Yes, you can change your Ecosystem Wallet name and icon. However, you cannot change the Ecosystem Wallet slug.
 </Details>
 
+## Gas Sponsorship
+
+<Details summary="Is the dedicated relayer a part of a specific thirdweb plan?">
+	No, the Dedicated Relayer service is an add-on service. View more information on the different tiers on the [pricing page](https://thirdweb.com/pricing). 
+</Details>
+
+<Details summary="What sort of benchmarks or throughput improvements can we expect from the dedicated relayer?">
+	A single executor will lead to about 20% faster queue to confirmation times and 15% higher throughput.
+
+	The premium tier with ten executors instead of one will improve this by 10x.
+</Details>
+
+<Details summary="How does the thirdweb dedicated relayer compare to other alternatives?">
+	Our dedicated relayer gives you your very own queue. It is also built for 7702 - meaning both user and server wallets can use it without any code changes and msg.sender still remains as the user. 
+
+	This is in contrast with an EIP-2771 relayer which requires contract changes.
+
+	Dedicated relayer also gives you easier analytics for Dune dashboards and more by just fetching all transactions originating from dedicated executors.
+</Details>
+
+<Details summary="When scaling on multiple relayer instances, is scaling managed?">
+	Yes, scaling is managed. You can choose the number of executors and chains through the different standard, premium, or custom tiers.
+
+	Infrastructure and automatic funding is already managed by thirdweb.
+</Details>
+
+<Details summary="How many transactions per second can dedicated relayers handle?">
+	This depends on the chain stability and features but typically ten executors can handle around 100 TPS. 
+</Details>
+
 ## Security & Recoverability
 
 <Details summary="How is the private key managed?">