Feature/add support for strings

[brads-perc]

What does this change?

Added support for generating a dart class containing strings from both .yaml and .xml

Fixes #340 🎯

[FR]: Custom Constants Generate from XML. #340

Type of change

Please delete options that are not relevant.

• [ x] New feature (non-breaking change which adds functionality)
• [ x] This change requires a documentation update

Checklist:

Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• [ ] Make sure to open a GitHub issue as a bug/feature request before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
  • [ ] Ensure the tests (melos run unit:test)
  • [ ] Ensure the analyzer and formatter pass (melos run format to automatically apply formatting)
• [ ] Appropriate docs were updated (if necessary)

[AlexV525]

@brads-perc Hi. Are you still on this? Could you update your branch and remove unnecessary changes to make the request clean so we can do further review?

[pedalPusher68]

@AlexV525 - I will make the updates, etc.

[AlexV525]

Please submit a new request before we can review it.