[WIP] Update gh aw commands to support both flags

[Copilot]

Adding --push and --create-pull-request flags to both commands

Implementation Complete

• Explored repository structure
• Found add_command.go has --create-pull-request flag
• Found init_command.go has --push flag
• Identified helper functions in git.go for commit/push operations
• Identified PR creation function addWorkflowsWithPR in add_command.go
• Add --push flag to gh aw add command
  • Update flag definition in NewAddCommand()
  • Pass push parameter to AddWorkflows function
  • Add push logic to addWorkflowsNormal function
  • Ensure push and create-pull-request are mutually exclusive
• Add --create-pull-request flag to gh aw init command
  • Update flag definition in NewInitCommand()
  • Pass createPR parameter to InitRepository function
  • Add PR creation logic similar to add command
  • Ensure push and create-pull-request are mutually exclusive
• Update tests
  • Add test for --push flag in add_command_test.go
  • Add test for --create-pull-request flag in init_command_test.go
  • Fix all test files with updated function signatures
• Manual testing
  • Test gh aw add with --push flag
  • Test gh aw init with --create-pull-request flag
  • Test error cases (both flags together, etc.)
• Run validation
  • Run make agent-finish before committing

Original prompt

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This section details on the original issue you should resolve

<issue_title>The gh aw add has --create-pull-request, while gh aw init has --push. Both should support both flags.</issue_title>
<issue_description>gh aw add has --create-pull-request

gh aw init has --push

Both commands should support both flags.
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes The gh aw add has --create-pull-request, while gh aw init has --push. Both should support both flags. #11913

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[pelikhan]

@copilot remove "--push" and instead support "--create-pull-request" in both commands

[pelikhan]

Restrated at #11916