Add SQL execution and table listing features to Dune client

[0xRobin]

• Implemented execute_sql method in ExecutionAPI to allow direct SQL execution via the API.
• Updated ExtendedAPI to utilize the new SQL execution method for running queries.
• Added list_tables method in TableAPI to retrieve a paginated list of tables.
• Introduced UsageResponse, TableInfo, and ListTablesResponse models for handling API responses.
• Enhanced unit tests to cover new features and response parsing for usage and table information.

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Note

Add support for executing raw SQL via /sql/execute, listing uploaded tables, and fetching usage data, with corresponding models and tests.

• API:
  • Execution: Add ExecutionAPI.execute_sql to run arbitrary SQL via /sql/execute.
  • Extensions: Update ExtendedAPI.run_sql to use direct SQL execution with polling and result fetch.
  • Tables: Add TableAPI.list_tables(limit, offset) to fetch paginated table listings.
  • Usage: New UsageAPI.get_usage(start_date, end_date) and include UsageAPI in ExtendedAPI mixin.
• Models:
  • Add UsageResponse, TableInfo, and ListTablesResponse with from_dict constructors.
• Tests:
  • E2E: Add test_run_sql; add skipped tests for get_usage and list_tables.
  • Unit: Add parsing tests for UsageResponse, TableInfo, and ListTablesResponse.

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