feat: introducing to -url and argv[1] param to test url from cli

[mtulio]

• introducing to -url param

  
  $ ./bin/go-url -url https://www.google.com
  #> Reading config from Param
  #> Found [1] URLs to test, starting...
  URL=[                            https://www.google.com] [  OK] : [200 OK] [952 ms]
  Total time taken: 953ms

$ ./bin/go-url -url https://www.google.com -dns

> Reading config from Param

> Found [1] URLs to test, starting...

URL=[ (www.google.com) https://[2607:f8b0:4008:811::2004]:443/] [ OK] : [200 OK] [962 ms] [DNS 106 ms] URL=[ (www.google.com) https://172.217.29.132:443/] [ OK] : [200 OK] [377 ms] [DNS 106 ms] Total time taken: 1446ms

- supporting `argv[1]` param as default target to test
```bash
$ ./bin/go-url https://www.google.com
#> Reading config from Param
#> Found [1] URLs to test, starting...
URL=[                            https://www.google.com] [  OK] : [200 OK] [942 ms]
Total time taken: 942ms

$ ./bin/go-url -dns https://www.google.com 
#> Reading config from Param
#> Found [1] URLs to test, starting...

URL=[    (www.google.com) https://[2607:f8b0:4008:811::2004]:443/] [  OK] : [200 OK] [1870 ms] [DNS 113 ms]
URL=[              (www.google.com)    https://172.217.30.68:443/] [  OK] : [200 OK] [236 ms] [DNS 113 ms]