This PR makes minor documentation improvements across several pages:

• Moves the "Docs cascade" image below the introductory text in the quickstart guide for better flow
• Reorders frontmatter fields in welcome.mdx for consistency
• Fixes line endings and removes extra whitespace
• Ensures consistent newlines at end of files

These changes improve readability and maintain consistent formatting across the documentation.

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Author: Deep Singhvi ([email protected])