slash commands and context syntax in ctrl+i highlighted code editing

[bachittle]

Validations

• [X] I believe this is a way to improve. I'll try to join the Continue Discord for questions
• [X] I'm not able to find an open issue that requests the same enhancement

Problem

Currently, the refactor section (when pressing ctrl+i) does not allow for adding context using @ syntax, or slash commands, like what can be done in the chat window (when pressing ctrl+l).

Solution

Use the same parser from the chat window in the refactor window.