Step 2 - IDE Create a `editor` module for file editor properties

• Step 1 - Add feature specs for IDE editor info
• Step 2 - IDE Create a editor module for file editor properties

What does this MR do?

This MR moves some editor specific properties away from the file object used in the IDE state.

• fileLanguage
• editorRow
• editorColumn
• viewMode

These properties are only needed for files that are actually opened in the monaco editor ☝ It's really wasteful for us to include them for every file in the file tree (even folders 😱)

Okay Paul, but what about the other properties mentioned in #222507 (closed)?

Those other properties might not actually fit in this new editor module. For the sake of iteration it's probably best to handle it in a separate more focused issue. Also see this relevant comment.

Screenshots

There are no visual changes and everything still works 😄

But! Here's a screenshot of the before/after memory snapshot of opening the Web IDE for the GitLab project 🎉

Before (on master)	After (this MR)

Does this MR meet the acceptance criteria?

Conformity

• [ ] Changelog entry There are no user facing changes here.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

References

• Related to #222507 (closed)