alphabetize sidenav; update references overview, index, and quickstarts overview

[alexisintech]

🔎 Previews:

What does this solve?

• Some references were missing from the reference overview. Some quickstarts were missing from the quickstart overview. Some references were missing from the index page.

What changed?

• Adds missing cards
• Alphabetizes side nav, except for most used SDKs

Quickstarts alphabetized, except for most used:

References alphabetized, except for most used:

Community SDKs alphabetized:

Checklist

• I have clicked on "Files changed" and performed a thorough self-review
• I have added the "deploy-preview" label and added the preview link(s) to this PR description
• All existing checks pass

[github-actions]

Hey, here’s your docs preview: https://clerk.com/docs/pr/1941