feat: Add batch operations support

[anjor]

Feature Request: Batch Operations Support

Overview

Implement batch operations support to allow executing multiple pltr commands in a single operation, improving efficiency for automation and bulk operations.

Proposed Implementation

• Add pltr batch command group
• Support file-based batch execution: pltr batch --file commands.txt
• Support inline batch execution: pltr batch "dataset get RID1; sql execute 'SELECT 1'; admin user current"
• Include error handling and rollback capabilities for failed operations
• Support parallel execution where safe (read operations)
• Add progress reporting for long-running batch operations

Use Cases

• Data Pipeline Automation: Execute multiple dataset and SQL operations in sequence
• Bulk Administration: Manage multiple users, groups, or permissions at once
• CI/CD Integration: Run comprehensive data validation scripts
• Reporting Workflows: Generate multiple reports with single command

Technical Requirements

• Extend CLI framework to support batch command parsing
• Implement transaction-like behavior for related operations
• Add comprehensive error handling and recovery
• Support both sequential and parallel execution modes
• Include dry-run mode for validation

Acceptance Criteria

• pltr batch --file batch.txt executes commands from file
• pltr batch "cmd1; cmd2; cmd3" executes inline commands
• Error handling prevents partial state corruption
• Progress reporting for long operations
• Dry-run mode validates without execution
• Parallel execution for safe read operations
• Comprehensive test coverage

Priority: Medium
Labels: enhancement, Phase-8
Effort: Large