Syntax highlighting for embedded brs in scenegraph

[TwitchBronBron]

This adds syntax highlighting support for embedded brightscript/brighterscript code in CDATA tags within scenegraph xml files.

Before:

After:

NOTE: this might prevent xml formatters from working properly.

[TwitchBronBron]

@rokucommunity/core-team What are your thoughts on merging this? I think it has the potential to take over any other xml language stuff. Should we hold off until we add xml formatting support?

[georgejecook]

NOTE: this might prevent xml formatters from working properly. is a big no no for me.

most folks I know have coding standards that prohibit embedded brs.
most folks I know also use xml formatters.

[chrisdp]

Do we know if this would break tools like the Redhat xml tools? This is used by developers to get completion support for custom components in their xml.

If there is a chance it could break xml tools I would hold off as developing in this style is definitely not the community norm. If anything a quick fix action or command in xml files with cdata to pull it into its own file might be more interesting to most 🤔

[TwitchBronBron]

I definitely don't want to break existing workflows or plugins, so I'll do some more investigation to determine what the full impacts are.

[elsassph]

I concur with: do not break XML coding experience.

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