GLink implementation

[ElectronicBlueberry]

Adds a GLink component. Reduces code duplication between this and GButton.

GLink looks like a link, but automatically switches to the correct html tag depending on the props provided, just like GButton.

How to test the changes?

(Select all options that apply)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[ahmedhamidawan]

Works great and looks really nice!

One thing, the GLink doesn't look visibly different when it is disabled. Maybe that's fine? Though i think a minor change with adding the g-disabled class and setting it as:

    &.g-disabled {
        cursor: not-allowed;
    }

could make it more obvious?:

[ElectronicBlueberry]

How about this?

    &.g-disabled {
        text-decoration: underline;
        color: var(--color-grey-500) !important;
        cursor: default;
    }

[ahmedhamidawan]

Thank you, looking forward to using these!

I think failing tests like:

FAILED lib/galaxy_test/selenium/test_workflow_run.py::TestWorkflowRun::test_workflow_run_button_disabled_when_required_input_missing - selenium.common.exceptions.TimeoutException: Message: Timeout waiting on CSS selector [#run-workflow.disabled] to become present.

are being resolved separately.