[Chatbot] - Drop custom styles on code editor #927

Chatbot Component Area

CodeModal

Describe the feature

We want to see if we can default to using the PatternFly code editor component styles without causing big changes in ChatBot. We created a custom one per Mark's old designs. Per @kaylachumley, Canvas mode is using the PatternFly code editor and having two separate ones can be jarring for users. After making changes, consult with Kayla to make sure that she is ok with them.

Validation

• This request aligns with PatternFly AI/Chatbot design guidelines.

• I have searched for existing chatbot-specific components.

Jira Issue: PF-4743