Important

Promisified exec calls in processes.ts and fixed typos in settings-diff.tsx and README.md.

• Promisify exec calls:
  • Introduced asyncExec function in processes.ts to promisify exec calls, improving error handling and readability.
  • Updated getProcessList and killProcessTree in processes.ts to use asyncExec.
• Fix typos:
  • Corrected SetttingDiff to SettingDiff in settings-diff.tsx.
  • Fixed typo in README.md from "migration filed" to "migration file".
• Tests:
  • Updated assertion logic in task.test.ts to improve message handling.

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