14 enhancement add helper to run whole shell command strings in

[b-jonathan]

Summary

Describe the purpose of this pull request. What does it do, and why is it needed?

Closes #(14) if applicable.

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Changes Made

• Added new stack: <stack name>
• Updated existing functionality
• Improved documentation
• Refactored internal code
• Fixed a bug

Briefly summarize the major changes:

• refactored runcmd to use string instead of array of strings

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Testing

How was this change tested?

• go test ./... passes locally
• Manual testing done with taco CLI
• CI checks pass

Provide details:

# Example test commands
go test ./...
taco init test-app