Add missing isEnabled command to new Element API

[garg3133]

Description of the bug/issue

The isEnabled command is currently missing from the new Element API. To support this command, a new file named isEnabled.js needs to be added inside lib/api/web-element/commands directory, whose content should be similar to the get* command files present in the same directory.

The argument passed to this.runQueuedCommandScoped in these files is the name of the corresponding method to be called from the lib/transport/selenium-webdriver/method-mappings.js file.

Steps to reproduce

Go to any test file and try to add const result = await browser.element('<selector>').isEnabled() and then run the test. This would result in error, while if you replace isEnabled() with getText(), it should work fine.

TODO

• Add missing command
• Fix JSDoc of the command
• Add tests for the new command
• Add types for the new command

[subhajit20]

hey @garg3133 , is there any changes needed ? Let me know.
And please assign me the issue

[starvader13]

Hey @garg3133 , I can take this issue and fix it up. Can you assign this to me?

[garg3133]

Completed in #4041.