feat: add simple verions cmd

[im6h]

Change Summary

What and Why:

• Default version will print all info of flyctl, so need to make it simple to display vx.x.x

How:

• Add a new struct to display simple: simpleInfo and check condition of the command input

Related to:

• #2460

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Documentation

• [x] Fresh Produce
• [ ] In superfly/docs, or asked for help from docs team
• [ ] n/a