Use CREATE_BREAKAWAY_FROM_JOB for StartDetached on Windows

[Copilot]

Windows automatically associates child processes with the parent's job object. Without CREATE_BREAKAWAY_FROM_JOB, detached processes inherit job constraints and lifecycle, defeating the purpose of detaching.

Changes

• Added CREATE_BREAKAWAY_FROM_JOB (0x01000000) flag constant
• Applied flag to detached process creation alongside DETACHED_PROCESS and CREATE_NEW_PROCESS_GROUP

This ensures StartDetached processes truly run independently from parent job objects.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Use CREATE_BREAKAWAY_FROM_JOB on Windows for StartDetached</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Use CREATE_BREAKAWAY_FROM_JOB on Windows for StartDetached #216

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[adamsitnik]

Constrained environments (containers, CI) don't allow for that.