feat(plugin-api): expose isCodeMirror flag on editorManager

[bajrangCoder]

No description provided.

[greptile-apps]

Greptile Summary

Exposes isCodeMirror boolean flag on the editorManager object, allowing plugins to detect the editor implementation at runtime. Since Acode migrated from Ace Editor to CodeMirror while maintaining Ace API compatibility, this flag helps plugins differentiate between the two implementations.

• Added isCodeMirror property to TypeScript EditorManager interface
• Set flag to true in the editorManager implementation
• Added test coverage to verify the flag value

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• Simple feature addition with proper TypeScript typing, clean implementation, and test coverage. The change is non-breaking (uses optional property), follows existing patterns, and serves a clear purpose for plugin API compatibility detection.
• No files require special attention

Important Files Changed

Filename	Overview
src/index.d.ts	Added isCodeMirror optional boolean property to EditorManager interface for plugin API
src/lib/editorManager.js	Set isCodeMirror: true flag in manager object to expose editor implementation type
src/test/ace.test.js	Added test case to verify isCodeMirror flag equals true

_{Last reviewed commit: 48fde29}