Pagination updates

[sfc-gh-jgarcia]

📚 Context

This PR addresses a few requests from @MathCatsAnd, namely:

1. Moves the pagination component a little higher in the page;
2. Allows to override the automatically generated previous and next links on a per-page basis.

🧠 Description of Changes

• Updated style of arrowLink.module.css, helpful.module.css and psa.module.css to better fit their new locations;
• Added a couple checks in [...slug].js to see whether there is a specific previousLink, previousTitle, nextLink and nextTitle being set at a page level, and use those instead of the automatically generated through getPreviousNextFromMenu

Before:

After:

How to set overrides for prev/next links:

---
title: Quickstart
slug: /streamlit-community-cloud/get-started/quickstart
nextLink: /streamlit-community-cloud/get-started/workspace
nextTitle: My nice next title
-—

💥 Impact

Size:

• Small
• Not small

🌐 References

• https://www.notion.so/snowflake-corp/Adjustments-to-docs-pagination-7fbb3b7a7e3d4051a44c65a1aa4f96cf?pvs=4

Contribution License Agreement

By submitting this pull request you agree that all contributions to this project are made under the Apache 2.0 license.

[sfc-gh-dmatthews]

Thanks @sfc-gh-jgarcia!