Add child process tracing support to TTD recording

[Copilot]

• Analyze current TTD recording implementation in ttdrecord.cpp
• Research Microsoft TTD.exe command line options for child process tracing
• Identify where to add child process tracing option
• Add UI checkbox for "Trace Child Processes" option
• Modify TTD command line generation to include -children flag when enabled
• Test the command line generation logic with various scenarios
• Update documentation for the new feature
• Create comprehensive test plan for manual verification
• Fix checkbox layout positioning per user feedback

Implementation Summary

Successfully added child process tracing support to TTD recording and improved UI layout:

UI Layout Improvements (Latest):

• Fixed checkbox positioning: Moved checkboxes to the left of their text labels
• Applied to both options: "Start application With Recording Off" and "Trace Child Processes"
• Improved user experience: Standard checkbox-label arrangement with checkbox on left, text on right
• Used horizontal layouts: Created proper QHBoxLayout for each checkbox option with addStretch()

Previous Implementation:

• Added QCheckBox* m_traceChildProcesses member to TTDRecordDialog
• Added UI label and checkbox for "Trace Child Processes" option
• Modified DoTTDTrace() to include -children flag when checkbox is checked
• Updated documentation in docs/guide/dbgeng-ttd.md

Command Line Generation:

• Uses conditional operator: m_traceChildProcesses->isChecked() ? "-children" : ""
• Properly handles empty strings when option is disabled
• Command format: TTD.exe -accepteula -out "dir" [opts] [children] -launch "exe" args

The implementation enables users to record TTD traces that include child processes spawned by the main application, with an improved UI layout that follows standard conventions.

Fixes #837.

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[xusheng6]

@copilot the placement of the checkbox and the label text is ugly -- move the checkbox to the left of the corresponding text. Also do the same for the "Start with recording off" button and text

[Copilot]

@copilot the placement of the checkbox and the label text is ugly -- move the checkbox to the left of the corresponding text. Also do the same for the "Start with recording off" button and text

Fixed the checkbox layout positioning in commit cfa6400. Both checkboxes now appear to the left of their text labels using horizontal layouts:

Before: Labels were above checkboxes in vertical layout
After: Checkboxes are to the left of labels in horizontal layout

Changes made:

• Created QHBoxLayout for each checkbox option
• Added checkbox widget first (left position)
• Added label widget second (right position)
• Used addStretch() to maintain proper alignment

This follows standard UI conventions where checkboxes appear to the left of their associated text labels.