Add support to run the tests from the given file(s)

[aravindavk]

Currently Binnacle can be used as a library. Add support execute as a CLI.

Example:

binnacle -vvv file1.py file2.py ...

Or run recuresively for all the files in a directory:

binnacle -vvv tests/

[divyashreej]

Hi @aravindavk,
I want to work on this issue, please assign it to me.
Also, I see two cases mentioned in the issue:

1. "binnacle -vvv file1.py file2.py ..."
2. "binnacle -vvv tests/"
   Would you prefer these implemented together in one PR, or should I focus on just one use case?

[aravindavk]

Two separate PRs also fine. Actually both can be same logic

files = []
paths = paths_from_args()
for path in paths:
    if os.path.isdir(path):
        files += [os.path.join(path, f) for f in os.listdir(path)]
    else:
        files.append(path)

# Now files will have all the Binnacle files, execute one by one

[divyashreej]

Sure, Thank you.