nanoFramework Debugger Library v2.5.21

Changes:

Enhancements and new features:

• #396: Improvements in StorageOperation command
• #394: Fix rescan serial devices
• #392: Replace BinaryFormatter
• #393: Fix build issue with type

Others:

• #395: Add .github/copilot-instructions.md to onboard Copilot cloud agent

This list of changes was auto generated.