Build Nightwatch using TypeScript.

[garg3133]

TODO:

• Copy non .ts/.js files to 'dist` after the build step.
• Fix failing tests.
• Test deploy the project and try it out on real projects.

After this change:

To use Nightwatch in dev, run:

npm run dev -- examples/tests/ecosia.js --env chrome

To run a specific Nightwatch unit test:

npm run mocha -- test/src/api/commands/client/testWaitUntil.js

[github-actions]

Status

• ❌ No modified files found in the types directory.
  Please make sure to include types for any changes you have made. Thank you!.

[garg3133]

I tried removing lib and then running tests locally, and all tests are passing. Hence, test runs are independent of lib now, and only depend on files present in dist.

[vaibhavsingh97]

I have reviewed this PR and it looks good overall. I have added a few comments for your consideration.

[beatfactor]

can we use ts-node with swc on dev? tsc is going to be very slow and annoying.