Add Pro Feature snippet to relevant pages in SDKs section (#94)

Author: devalog

fern/products/sdks/guides/configure-auto-pagination.mdx

@@ -3,6 +3,8 @@ title: Configure Auto Pagination
 description: Paginate through API responses easily with offset, cursor, and link-based pagination.
 ---
 
+<Markdown src="/snippets/pro-callout.mdx"/>
+
 Fern's auto pagination supports offset-based and cursor-based pagination schemes,
 providing SDK users with simple iterators to loop through all results instead of
 managing pagination complexity manually.

fern/products/sdks/guides/configure-idempotency.mdx

@@ -3,6 +3,8 @@ title: Configure Idempotency Headers
 description: SDKs that safely support retrying requests
 ---
 
+<Markdown src="/snippets/pro-callout.mdx"/>
+
 For endpoints you've configured as idempotent, Fern's SDKs allow you to
 specify idempotency headers. Typically the headers include `Idempotency-Key`,
 but you can also specify additional headers.

fern/products/sdks/guides/filter-your-endpoints-audiences.mdx

@@ -3,6 +3,8 @@ title: Filter Your Endpoints (Audiences)
 description: Guide to filtering your API endpoints using audiences.
 ---
 
+<Markdown src="/snippets/pro-callout.mdx"/>
+
 Learn how to use audiences to filter which endpoints are included in your SDKs and documentation.
 
 <Warning>Docs are coming soon for this page.<br/><br/>Please [book a demo](https://buildwithfern.com/book-demo) or [reach out to us](https://buildwithfern.com/book-demo) to get set up with this feature. </Warning> 

fern/products/sdks/overview/java/custom-code.mdx

@@ -106,6 +106,8 @@ description: Augment your Java SDK with custom utilities
 
 ## Adding custom dependencies
 
+<Markdown src="/snippets/pro-callout.mdx"/>
+
 To add packages that your custom code requires, update your `generators.yml`.
 
       ```yaml {4-7} title="generators.yml"

fern/products/sdks/overview/python/custom-code.mdx

@@ -117,6 +117,8 @@ description: Augment your Python SDK with custom utilities
 
 ## Adding custom dependencies
 
+<Markdown src="/snippets/pro-callout.mdx"/>
+
 To add packages that your custom code requires, update your `generators.yml`.
 
       ```yaml {4-7} title="generators.yml"

fern/products/sdks/overview/typescript/custom-code.mdx

@@ -109,6 +109,8 @@ description: Augment your TypeScript SDK with custom utilities
 
 ## Custom dependencies
 
+<Markdown src="/snippets/pro-callout.mdx"/>
+
 To add packages that your custom code requires, update your `generators.yml`.
 
       ```yaml {4-7} title="generators.yml"