feat(retrieve): expand document location extraction for all KB source types

[strands-agent]

Description

Expand the format_results_for_display function in the retrieve tool to handle all RetrievalResultLocation types from the Bedrock Knowledge Base API, not just customDocumentLocation and s3Location.

Changes:

• Added support for webLocation (WEB)
• Added support for confluenceLocation (CONFLUENCE)
• Added support for salesforceLocation (SALESFORCE)
• Added support for sharePointLocation (SHAREPOINT)
• Added support for kendraDocumentLocation (KENDRA)
• Added support for sqlLocation (SQL)
• Added 7 new unit tests covering all location types plus unknown/future types

Reference:

https://docs.aws.amazon.com/bedrock/latest/APIReference/API_agent-runtime_RetrievalResultLocation.html

Related Issues

Closes #364

Type of Change

• Bug fix
• New Feature (adds support for additional location types)
• Breaking change
• Other

Testing

• All 30 tests pass including 7 new tests
• Ran ruff format and ruff check - no issues

$ python -m pytest tests/test_retrieve.py -v
============================= test session starts ==============================
collected 30 items

tests/test_retrieve.py::test_format_results_with_web_location PASSED     [ 80%]
tests/test_retrieve.py::test_format_results_with_confluence_location PASSED [ 83%]
tests/test_retrieve.py::test_format_results_with_salesforce_location PASSED [ 86%]
tests/test_retrieve.py::test_format_results_with_sharepoint_location PASSED [ 90%]
tests/test_retrieve.py::test_format_results_with_kendra_location PASSED  [ 93%]
tests/test_retrieve.py::test_format_results_with_sql_location PASSED     [ 96%]
tests/test_retrieve.py::test_format_results_with_unknown_location PASSED [100%]

============================== 30 passed in 0.79s ==============================

Checklist

• I have read the CONTRIBUTING document
• I have added tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly (code comments reference AWS API docs)
• My changes generate no new warnings
• Any dependent changes have been merged and published

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