Enhanced sed Command Validation

What: The sed command validator now supports explicit file write permission control.

How it works:

• New allowFileWrites parameter controls whether in-place editing is permitted
• When in "acceptEdits" mode, -i and --in-place flags are allowed
• Otherwise, sed write operations require explicit approval

Details:

• Function signature changed to accept options object with allowFileWrites
• Evidence: h92() at line ~314399 with parameter G?.allowFileWrites