feat: Add CLI Commands for Browsing and Searching OpenML Studies

[pankajbaid567]

This commit implements CLI commands for browsing and searching OpenML studies and benchmark suites, addressing issue #1506.

Features Added:

1. Studies List Command ()

• Lists studies and/or benchmark suites with optional filtering
• Supports filtering by:
  • Status (active, in_preparation, deactivated, all)
  • Uploader ID
  • Type (study, suite, or all)
  • Size and offset for pagination
• Three output formats: list (default), table, json
• Verbose mode shows detailed information

2. Studies Info Command ()

• Displays detailed information about a specific study or suite
• Automatically detects whether ID refers to a study or suite
• Shows study metadata, description, and entity counts
• Verbose mode displays first 10 IDs of associated entities

3. Studies Search Command ()

• Case-insensitive search by name or alias
• Searches both studies and suites simultaneously
• Optional status filtering
• Multiple output formats supported
• Verbose mode for detailed results

Implementation Details:

• Added imports for study functions and types (OpenMLStudy, OpenMLBenchmarkSuite)
• Created helper functions for formatting:
  • _format_studies_output(): Routes to appropriate formatter
  • _format_studies_table(): Displays studies in tabular format
  • _format_studies_list(): Displays studies as simple list
  • _display_study_entity_counts(): Shows entity counts
  • _display_study_entity_ids(): Shows first 10 entity IDs
• Main command functions:
  • studies_list(): Handles listing with filters
  • studies_info(): Displays detailed study information
  • studies_search(): Performs search operations
  • studies(): Dispatcher for routing subcommands
• Updated main() to register studies subparser with all arguments
• Added proper type annotations using Union types

Testing:

• Created comprehensive test suite with 19 tests
• All tests passing (19/19)
• Tests cover:
  • Listing studies, suites, and combined results
  • Filtering by status, uploader, and type
  • Info display for studies and suites
  • Fallback from study to suite
  • Search functionality with various filters
  • Different output formats (list, table, json)
  • Verbose mode
  • Dispatcher routing
  • Error handling

Code Quality:

• All pre-commit checks passing:
  • ruff: Passed
  • ruff-format: Passed
  • mypy: Passed (with proper Union type annotations)
• Code complexity kept under limits through helper function extraction
• Proper error handling with informative messages
• Follows existing CLI patterns and conventions

Related: #1506