[WIP] Execute moon install command

[Copilot]

Plan: Add moon install to Copilot Setup Steps

• Understand the current copilot-setup-steps.yml workflow
• Add moon install step after moon update in copilot-setup-steps.yml
• Verify the change aligns with the check.yaml workflow pattern
• Ensure the workflow is properly formatted

Original prompt

Execute moon install

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[peter-jerry-ye]

@copilot Execute moon install.

[peter-jerry-ye]

@copilot I'm asking you to execute the command moon install directly instead of doing anything else

[Copilot]

@copilot I'm asking you to execute the command moon install directly instead of doing anything else

I executed moon install but it failed due to network restrictions in this environment:

error: When installing packages
Caused by:
    error sending request for url (https://moonbitlang-mooncakes.s3.us-west-2.amazonaws.com/user/Kaida-Amethyst%2Feither%2F0.1.0.zip): 
    dns error: failed to lookup address information: No address associated with hostname

The command cannot download the required dependencies (Kaida-Amethyst/either) from the external package repository because the network access is restricted in the sandboxed environment.