feat(windows): implement multi platform process kill

[cwoolum]

Summary

This PR enhances the Amazon Q CLI with cross-platform process termination capabilities and optimizes Windows performance through stack size adjustments. These improvements ensure consistent behavior across operating systems while addressing Windows-specific memory constraints.

Changes

• Added Windows-specific implementation for process termination
• Ensured consistent behavior between Windows, macOS, and Linux platforms
• Implemented proper error handling for process termination failures
• Increased thread stack size allocation for Windows environments
• Optimized memory management for Windows-specific constraints

Technical Details

Process Termination

• Implemented platform-specific code paths for process termination
• Used Windows API for Windows and POSIX signals for Unix-based systems
• Added proper error handling and logging for failed termination attempts

Stack Size Optimization

• Increased default thread stack size on Windows to prevent stack overflow errors
• Windows has different memory management characteristics compared to Unix-based systems, requiring larger stack allocations
• This change prevents crashes during deep recursion or when handling complex data structures
• The stack size increase is crucial for stable operation on Windows, particularly when processing large amounts of data or during intensive operations

Default Stack Size Differences

• Windows default stack size: 1MB for user threads (significantly smaller than Linux)
• Linux default stack size: 8MB for user threads
• This 8x difference is critical when running memory-intensive operations
• Windows' smaller default stack size can lead to stack overflow errors in scenarios that work fine on Linux
• Our increase aligns the Windows stack size more closely with Linux defaults, ensuring consistent behavior across platforms
• This adjustment is particularly important for recursive operations and deep call stacks that are common in our CLI operations

Testing

• Verified process termination works correctly on Windows systems
• Confirmed backward compatibility with existing Unix/Linux implementations

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 16.75%. Comparing base (79059f4) to head (87061f3).
Report is 21 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1875   +/-   ##
=======================================
  Coverage   16.75%   16.75%           
=======================================
  Files         213      213           
  Lines       20704    20704           
  Branches      871      871           
=======================================
  Hits         3468     3468           
  Misses      17236    17236           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[brandonskiser]

What is this command doing? Would rather tests not do stuff like send network requests to localhost if we can rather do a sleep 10000 or something otherwise

[cwoolum]

Good call, no need to make network calls. Changed to be a timeout instead

[brandonskiser]

Can we include the reference to the Linux manpage still in this doc comment? https://www.man7.org/linux/man-pages/man5/os-release.5.html

[cwoolum]

Done