Refactor project structure and remove deprecated files

[kordless]

Summary

• Deleted obsolete files in backup and mitta_shell_temp directories.
• Restructured lib/aifunc.py:
  • Added AsyncAnthropic, TextBlock, ToolUseBlock imports.
  • Enhanced logging and error handling.
  • Allowed parallel function execution.
• Updated lib/function_wrapper.py:
  • Added type mappings for float, list, and dict.
  • Enhanced function info detection.
• Enhanced lib/util.py:
  • Added format_response for better response formatting.
  • Ensured UTF-8 encoding for smoother emoji handling.
• Cleanup and logging improvements in webwright/main.py.

These changes streamline the codebase, improve parallel execution, and fix several encoding issues.

[kordless]

this was an errant commit message which got created as an issue.