/claim #112

Summary

• Update the VS Code extension to rewrite .flyde file-source imports after relevant file or folder moves.
• Rebase references when the imported flow moves, when the importing flow moves, and when imports live under a moved directory.
• Add focused coverage for moved imported files, moved parent flow files, and moved directories with dotted names.

Verification

• tsc -p ./ from vscode after generating local workspace package declarations
• eslint src --ext ts from vscode (0 errors; existing unrelated warnings remain)
• git diff --check
• Direct Node behavior checks against the compiled flow-file-references helper