feat: add v1

[busunkim96]

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Make sure to open an issue as a bug/issue before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

Fixes #36 🦕

[busunkim96]

(Please ignore the samples tests, I'm doing some other testing with those configs but there are no samples in this repo right now: https://github.com/googleapis/python-websecurityscanner/tree/master/samples)