feat(url): add parse subcommand to parse URLs into components

[am2rican5]

Summary

• Add url parse subcommand that parses URLs into their components (scheme, host, port, path, query, fragment, username, password)
• Query parameters are extracted as key-value pairs
• Duplicate query parameter keys are grouped into arrays (e.g., ?a=1&a=2 → {"a": ["1", "2"]})

Usage

ut url parse "https://example.com:8080/path?key=value#section"