Improve PangaeaDataset behavior, logging, and test compatibility

[doswal]

Summary

This PR improves the PangaeaDataset implementation by aligning its behavior with NOAADataset, refining logging practices, and updating tests accordingly. It also enhances usability by returning results directly and suppressing noisy third-party logs.

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Key Changes

1. Return behavior improvements

• Updated search_studies() to return a DataFrame instead of None
• Ensures consistency with NOAADataset
• Prevents breakage in:
  • existing tests
  • tutorial notebooks
  • documentation workflows

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2. Logging refactor

• Replaced warnings.warn with logger.warning
• Standardized logging across the module
• Improved message clarity and consistency

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3. Test updates

• Updated tests to use caplog instead of pytest.warns
• Ensures compatibility with new logging-based warnings
• Maintains coverage for warning-triggered scenarios

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4. Suppress third-party logging noise

• Suppressed verbose logs from pangaeapy
• Prevents debug/info messages from appearing in user-facing output
• Improves usability and cleaner CLI/notebook experience

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5. Additional improvements

• Made search_studies() behavior consistent across dataset providers
• Added support for additional kwargs (e.g., data_type)
• Improved handling of collection datasets and related warnings
• General cleanup and consistency improvements

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Motivation

• Align behavior across dataset providers (NOAADataset vs PangaeaDataset)
• Improve user experience (clean output, consistent return types)
• Modernize logging approach (move away from warnings)
• Ensure tests remain robust and meaningful

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Impact

• No breaking API changes (behavior is now more consistent)
• Tests updated accordingly
• Cleaner logs for users and downstream applications

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Testing

• Existing tests updated and passing
• Verified:
  • search functionality
  • logging behavior via caplog
  • compatibility with tutorial notebooks

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TL;DR

• search_studies() now returns results
• warnings → logging
• tests updated
• noisy pangaeapy logs suppressed