fix: avoid DEP0190 warning when spawning subprocesses with shell mode

[notgitika]

Description

• When shell: true is passed to spawn/spawnSync alongside a non-empty args array, Node.js >= 22 emits a [DEP0190] DeprecationWarning
• Added a resolveCommand helper in subprocess.ts that merges args into the command string when shell mode is active, passing an empty args array to the spawn
  call
• Applied the fix to all 5 subprocess functions (runSubprocess, checkSubprocess, runSubprocessCapture, runSubprocessCaptureSync, checkSubprocessSync)

Related Issue

Closes #305

Documentation PR

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Other (please describe):

Testing

How have you tested the change?

• I ran npm run test:unit and npm run test:integ
• [ x] I ran npm run typecheck
• I ran npm run lint
• If I modified src/assets/, I ran npm run test:update-snapshots and committed the updated snapshots

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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[tejaskash]

Can we supress or acknowledge the CodeQL warnings? The warnings might be on some code that is there by design but would be good to double check

[tejaskash]

Verify CodeQL warnings