feat: extract core rule utilities

[jcfranco]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already include this feature request, without success.

Describe the Feature Request

The core utilities used by rules for Stencil to be extracted into a separate module or repo.

Describe the Use Case

Having a set of core utils would make it easier to create project-specific rules for Stencil-based projects.

Describe Preferred Solution

A separate package with core rule utilities. I have created stencil-eslint-core and have a fork of stencil-eslint to demonstrate this in action. All tests are passing.

Describe Alternatives

No response

Related Code

No response

Additional Information

No response