Add argument to pass output directory

[ghimiresdp]

• add more to gitignore
• feat: add argument --out or -o so that it can be downloaded to specific folder
• docs: update readme

Description

Now furl cli allows -o or --out argument to be passed to download file to the custom directory.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Performance improvement

Checklist

• I have run cargo fmt to ensure consistent code style.
• I have run cargo test and all tests passed.
• I have added new tests that prove my fix is effective or that my feature works.
• I have updated the README.md (if applicable).

Performance Impact