Basic XML support

[GregoryTravis]

Pull Request Description

This PR includes

• Reading XML from a file, stream, or string
• Reading XML via Data.fetch
• Accessing the root element, element children, and attributes
• Accessing tag text contents
• Get tags by name
• Inner / Outer XML string

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• All code has been tested:
  • Unit tests have been written where possible.
  • If GUI codebase was changed, the GUI was tested when built using ./run ide build.

[radeusgd]

Awesome, thanks!

If you could please add one slight suggeste change in the tests it would make the test case more 'full', and I'm just curious what's the behaviour there 🙂

[jdunkerley]

Generally looks good.

Some suggested changes and you need to check how XML Doc and Element are rendered in the Table view.

[GregoryTravis]

to_display_string and to_js_object: