Webhook refactor

New webhook receiver (_./webhook/jawareceiver.py)
- now powered by Python! Moving the receiver into the flask application reduces dependencies on other repos and frameworks.
- the new receiver uses a new validation method that allows for basic authentication (#12 & #14).
Refactored configuration files
- Consolidated webhook configuration file (./data/webhooks.json), all configuration files moved to data/.
- Added keys for basic auth to the conf file (#12 and #14).
- Added key for tagging webhooks (Jamf Pro vs Okta at this time).
- Added key to log the JAWA user that created the webhook.

Project file tree restructure
- Consolidated all files within the jawa project directory, which can now be stored anywhere (todo: prompt for installation path during installation).
- Organized files into new directories (./bin/, ./data/ & ./webhook/) based on their function.
Relative paths
- Changed all paths to relative paths.
- This change allows for JAWA to be semi-functional on Windows. E.g., webhook features should work, but Windows doesn't have cron.
Code Lint
- New methods created to organize the code and improve readability.
- Removed some cruft.
- Leveraged more Python 3 features, like f strings.

jamf / JAWA