Problem

Currently, E2E test execution is controlled via an environment variable:

Skip.If(Environment.GetEnvironmentVariable("E2E") != "true");

This approach can be fragile and less discoverable for contributors or CI systems.

Proposal

Explore and implement an alternative method for controlling E2E test execution. Ideally, the new approach should be more explicit and user-friendly (e.g., using test categories, command-line options, or configuration files).

Acceptance Criteria

• Remove the direct dependency on the "E2E" environment variable in test skipping logic.
• Document how to run or skip E2E tests with the new mechanism.
• Ensure compatibility with CI and local developer workflows.