Enhancements to timing_report_to_verilog.tcl script and help updates

[gnersisy]

• Updated the help to clarify that the script does not fully support timing paths containing macro cells,
• Fixed issues in the timing report parsing logic,
• Added a check for Verilog files with no output ports. If no output ports are detected, the corresponding line in the Verilog file is commented out to prevent errors.