[📑 Docs]: Expand page: Athena + Glue + S3 Data Lake Query

[blkgrlcto]

What docs changes are you proposing?

Source: https://github.com/localstack-samples/sample-athena-glue-s3-data-lake-query

Problem

Only linked repo, no docs content.

Proposal

• Add page with:
  • Introduction (query structured/unstructured data in S3 with Athena + Glue)
  • Prerequisites (LocalStack Pro, AWS CLI, Python/SQL client)
  • Architecture diagram (S3 bucket → Glue catalog → Athena query engine)
  • Steps (clone repo, deploy, load data, run query)
  • Testing the application (Athena SQL query returns expected rows)
  • Conclusion (analytics workflows locally)

Acceptance Criteria

• Doc page present with all 6 sections.

Code of Conduct

• I agree to follow this project's Code of Conduct

[M-A-SAIADITHYAA]

The above content should be added as a page in https://docs.localstack.cloud/?