Re-organize sidebar navigation

[josh-wong]

Description

This PR re-organizes the sidebar navigation to include new docs, which should provide a better flow for users to follow when using ScalarDB.

Related issues and/or PRs

N/A

Changes made

• Re-organize the sidebar contents for the latest version (3.13) and 3.12.

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have updated the side navigation as necessary.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes. N/A
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.). N/A
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published. N/A

Additional notes (optional)

N/A

[netlify]

✅ Deploy Preview for staging-scalardb-community-doc-reorg ready!

Name	Link
🔨 Latest commit	9ab0f52
🔍 Latest deploy log	https://app.netlify.com/sites/staging-scalardb-community-doc-reorg/deploys/66bb27a709835d000875052d
😎 Deploy Preview	https://deploy-preview-138--staging-scalardb-community-doc-reorg.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.