ISSUE #34 - improve port resolution

[jsnfwlr]

Description

• standardize tcp4/tcp6 as tcp, and udp4/udp6 as udp before performing resolution
• use github.com/thediveo/netdb for quick and easy resolution that can be expanded with definition file if needed in the future

Related Issues

#34

Type of Change

• bug fix
• new feature
• breaking change
• documentation
• refactoring
• other:

AI Disclosure

• ai: none — no ai assistance used
• ai: assisted — ai helped with portions (describe below)
• ai: generated — significant portions were ai-generated (describe below)

Checklist

• i have tested these changes locally
• i have run make test and all tests pass
• i have run make lint and fixed any issues
• i have updated documentation if needed
• my code follows the existing style of the project

Screenshots / Terminal Output

[jsnfwlr]

@karol-broda can I please get eyes on this?

[karol-broda]

hey @jsnfwlr , sorry for the late reply on this. the tcp6/udp6 fix is spot on.
i'm gonna pass on the netdb dependency for now, trying to keep external deps minimal. will probably just parse /etc/services directly instead. might revisit the library idea later
appreciate the effort either way!