Clean up quickstart page formatting and consistency

[mintlify]

Summary

Cleaned up the quickstart documentation page by fixing formatting inconsistencies, removing redundant text, and ensuring version requirements are consistent throughout. These changes improve readability and reduce confusion for users following the quickstart guide.

Changes

• Fixed awkward line break in the keyboard shortcut tip for the web editor command menu
• Updated Node.js version requirement in troubleshooting section to match the CLI prerequisite (v20.17.0+)
• Removed redundant "Click to jump to this section" text from workflow navigation cards
• Simplified wording in the skip-to-custom-domain card
• Removed unnecessary "you are" from a sentence about setting up docs

Files Changed

• quickstart.mdx