v6 chatbot - Explore custom Monaco theme

[rebeccaalpert]

Kayla has suggested we use PatternFly tokens in the CodeModal. Unfortunately, PatternFly is using a default Monaco editor theme for CodeEditor (vs-dark). This means we have to keep some hard-coded hex value colors for the time being.

We should explore retheme-ing as time allows.

[dlabaj]

@tlabaj Is this something we need to update in Patternfly react and core?

[tlabaj]

cc @mcoker

[rebeccaalpert]

(The styles are coming from the third-party dependency @monaco-editor/react.)