v1.0.2 - Scope Cursor to Editor DOM

Changes

• Scoped Positioning: Moved the custom cursor and trail smears from document.body to
  the editor DOM container (.cm-editor) using relative absolute positioning.
• Canvas Compatibility: The cursor trail now scales, pans, and zooms naturally with
  Canvas nodes.
• Orphan Cleanup: Scoping elements to the editor DOM automatically cleans up the cursor
  elements when editors are closed or split, eliminating ghost cursors in the file explorer
  sidebar.