Updated config and imports for module resolution

[shalarewicz]

Summary

This PR updates imports to support ESModules per the typescript docs.

Adds linting rules to enforce the addition of file extensions to import statements.

Updates jest config to support module resolution during testing.

Type of Change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)

Issues

• N/A

Evidence

• All tests pass as expected.