chore: last touches (#1263)

fair use policy and support page

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

## Summary by CodeRabbit

- **New Features**
- Added a "Support" documentation page outlining various support options
for users, including Community, Paid Account, and Enterprise support.
- Introduced a "Fair Use Policy" documentation page, providing
guidelines and reassurance regarding usage of the service.
- Enhanced the account creation documentation with additional
information about the Fair Use Policy.

- **Improvements**
- Updated the documentation structure with new sections for easier
navigation, including "Support" and "Fair Use Policy."

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

apps/documentation/pages/users/get-started/account-creation.mdx

@@ -3,7 +3,7 @@ title: Create Your Account
 description: Learn how to create an account on Documenso.
 ---
 
-import { Steps } from 'nextra/components';
+import { Callout, Steps } from 'nextra/components';
 
 # Create Your Account
 
@@ -14,6 +14,8 @@ The first step to start using Documenso is to pick a plan and create an account.
 
 Explore each plan's features and choose the one that best suits your needs. The [pricing page](https://documen.so/pricing) has more information about the plans.
 
+<Callout>All plans are subject to our [Fair Use Policy](/users/fair-use).</Callout>
+
 ### Create an account
 
 If you are unsure which plan to choose, you can start with the free plan and upgrade later.