up-go: new port

[hoanga]

add port for up.

tested on 14.2 as well as tested the port builds under poudriere

sample run:

$ uname -a
FreeBSD quincy 14.2-RELEASE FreeBSD 14.2-RELEASE releng/14.2-n269506-c8918d6c7412 GENERIC amd64

$ up -h

        Troubleshoot problems with your Internet connection based on different
        protocols and public servers.

        OUTPUT
        Details about each request:
        {Protocol used} {Response time} {Remote server} {Extra info}

        EXIT STATUS
        This utility exits with one of the following values:
        0 At least one response was heard.
        2 The transmission was successful but no responses were received.
        1 Any other error occurred.

Usage of up:
  -c uint
        Number of iterations
  -d duration
        Delay between requests (default 500ms)
  -dr string
        DNS resolution server
  -g    Output in grepable format
  -h    Show app documentation
  -j    Output in JSON format
  -nc
        Disable color output
  -nstd
        Disable standard input target reading
  -p string
        Test only one protocol
  -s    Stop after the first successful request
  -t duration
        Time to wait for a response (default 5s)
  -tg string
        Protocol is required because the format is dependent: URL for HTTP, host:port for TCP, domain for DNS
  -vv
        Verbose output