Refactor/replace package name

[ergusto]

Introduction

Functionality is unchanged. Focus has been on reformatting variable and function names, tests and docs to reflect new package name.

Changes

• Replaces package name in readme with updated package name
• Replaces package name in package.json with updated package name, and updated package description
• Replaces package name in tests with updated package name
• Updated CLI example with renamed arguments
• Updates Fastify plugin initialisation to use updated package name
• Updates Fastify decorators to use new plugin name
• Rewrites exposed type declarations to reflect new package name
• Replaces plugin decorator usage in tests with updated decorator name

Notes

The auth0 specific tests and relevant environment variables should be moved to the new auth0 specific repository when the new wrapper package is created.

There was a suggestion in this comment that the exposed auth0Verify and auth0VerifySecretsCache Fastify decorators may no longer need to be exposed in this package. They are used internally however so a more involved refactor would be required to remove them. They have so far just been renamed to reflect the new package name.

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[ergusto]

@simoneb I'm not able to add the environment variables required in the failing tests to this repository as I do not have admin rights, but the tests have been passing successfully for me locally.

[simoneb]

LGTM