Add OpenAPI spec support for policy schema creation

[daveads]

Description

This PR adds a new command permit env apply openapi that allows users to create a complete policy schema from an OpenAPI specification file. The command reads x-permit-* extensions from the OpenAPI spec and creates corresponding resources, actions, roles, relations, and URL mappings in the Permit environment.

Closes #79

[gemanor]

This needs some more work, see comments. Main issues:

1. Complex and mostly impossible to test/debug logic in the processor file.
2. API calls made through the fetchUtil and not the useClient
3. Please attach to the PR some YAML/JSON OpenAPI files where we can test it

[daveads]

This needs some more work, see comments. Main issues:

1. Complex and mostly impossible to test/debug logic in the processor file.

2. API calls made through the `fetchUtil` and not the `useClient`

3. Please attach to the PR some YAML/JSON OpenAPI files where we can test it

npx tsx ./source/cli.tsx env apply openapi --spec-file https://raw.githubusercontent.com/daveads/openapispec/main/blog-api.json

Repo :: https://github.com/daveads/openapispec