[Feature] Remove script name from arguments passed to main block

[hdwalters]

Is your feature request related to a problem? Please describe.
When command line arguments are passed to a Bash script, the $@ array contains only the arguments:

hwalters@Ghostwheel ~/git/amber (improve-command-line-interface) 
$ cat args.sh
#!/usr/bin/env bash
for arg in "$@"; do
    echo $arg
done
hwalters@Ghostwheel ~/git/amber (improve-command-line-interface) 
$ ./args.sh 1 2 3
1
2
3

However, when command line arguments are passed to an Amber script, the array passed to the main block contains the executable name bash as well. Note, this requires changes on my feature branch to pass command line arguments, as described in issue #411:

hwalters@Ghostwheel ~/git/amber (improve-command-line-interface) 
$ cat args.ab
#!/usr/bin/env amber
main(args) {
    for arg in args {
        echo arg
    }
}
hwalters@Ghostwheel ~/git/amber (improve-command-line-interface) 
$ ./args.ab 1 2 3
bash
1
2
3

This is inconsistent, and will cause confusion among users. Additionally, we get no extra information from the contents of the $0 variable, as it will only ever contain bash.

Describe the solution you'd like
I would like the Amber script to be passed the command line arguments only, for consistency with Bash scripts.

I would also like to add a standard library function to partition the command line arguments into positional parameters and options (starting - or --):

pub fun partition_args(args: [Text], ref params: [Text], ref options: [Text]): Null {
    ...
}

Describe alternatives you've considered
N/A

Additional context
This is occurring because the main block is explicitly passed $0 as well as $@:

#!/usr/bin/env bash
# Written in [Amber](https://amber-lang.com/)
# version: 0.3.5-alpha
# date: 2024-11-03 10:34:32
# #!/usr/bin/env amber
args=("$0" "$@")
for arg in "${args[@]}"; do
    echo "${arg}"
done