Description

This PR moves the ScalarDB 3.13 docs to a versioned folder since the ScalarDB 3.14 docs will be added to the docs (latest) folder.

Related issues and/or PRs

N/A

Changes made

• Moved docs for 3.13 into a version folder (versioned_docs/version-3.13), according to the Docusaurus versioning instructions.
• Added a homepage component for 3.14 and version dropdown menu.

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.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

N/A