2. parseArgs(argv)

Parses an array of CLI arguments into positional and named arguments.

Example:

          
            1node cli.js foo bar --count 3 --verbose true
          
        

Output:

          
            1{2  positional: ["foo", "bar"],3  named: { count: 3, verbose: true }4}
          
        

Behavior:

• --key value becomes named[key] = value.
• Multiple values after a flag become an array.
• Flag with no value → true.
• Single-value arrays are simplified to a single value.

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