[WIP] Address feedback from review on V3 dev PR

[Copilot]

Plan to address review feedback

• Understand current implementation of installAsync and saveAtAsync
• Modify installAsync to collect errors instead of throwing on first failure
• Modify saveAtAsync to collect errors instead of throwing on first failure
• Ensure both functions continue processing remaining fonts after errors
• Add error information to the return type to report failures
• Update CLI to handle aggregate errors and display results + failures
• Test the changes to ensure proper error handling
• Run code review
• Run security checks

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