Docs: add Delta Lake Migration to nav (fix #14309)

[MeongSuper]

Restored the missing Delta Lake Migration page in the documentation navigation.

Changes:

• Updated docs/mkdocs.yml to include a Migration section:
  • table-migration.md
  • hive-migration.md
  • delta-lake-migration.md

Verified locally using: mkdocs serve -f docs/docs/mkdocs.yml

Related Issues:
Fixes #14309
See also #13761 (original missing migration issue)

[ebyhr]

Could you add a screenshot to the PR description?

[MeongSuper]

Could you add a screenshot to the PR description?

Added the screenshot to the PR description

[ebyhr]

The style in the screenshot is different from the actual generated page. You can run make serve command in site directory instead. The generated page will be like this.

[MeongSuper]

The style in the screenshot is different from the actual generated page. You can run make serve command in site directory instead. The generated page will be like this.

I ran into an issue with make serve where it regenerates site/docs/docs/latest/mkdocs.yml from the remote iceberg_docs/docs worktree, which overwriting local changes.

So as workaround i did this:

• Ran make serve from the site directory to generate the initial build structure.
• Then, manually edited site/docs/docs/latest/mkdocs.yml to include the "Migration" section:

  - Migration:
      - Overview: table-migration.md
      - Hive Migration: hive-migration.md
      - Delta Lake Migration: delta-lake-migration.md

• Served the site with mkdocs serve -f mkdocs.yml -v to verify the change in the sidebar nav
  Here’s the updated screenshot showing the "Migration" section in the sidebar, matching the production style:

This confirms the nav works locally. Let me know if this looks good or if there’s a better way to handle the build issue!

[kevinjqliu]

LGTM

rendered locally:

[kevinjqliu]

@MeongSuper you can merge main (with #14267) and run make serve-dev to render locally

[kevinjqliu]

Thanks @MeongSuper and @ebyhr for the review