Fix rust evals (run cargo with bash) + logging tweaks

[cte]

Description

Thanks @jr for flagging.

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Important

Enhance Rust evaluation execution with bash, improve logging, and add utility functions for git operations in the evals package.

• Behavior:
  • Run Rust evaluations using bash in runUnitTest() in runUnitTest.ts.
  • Remove console log of result in main() in index.ts.
  • Add sendCommand() method to IpcClient in ipc-client.ts for sending task commands.
• Utilities:
  • Add resetEvalsRepo() and commitEvalsRepoChanges() in utils.ts for git operations.
  • Use resetEvalsRepo() and commitEvalsRepoChanges() in runEvals() in runEvals.ts.
• Logging:
  • Improve logging in runTask() in runTask.ts and runUnitTest() in runUnitTest.ts.
  • Add log() and logError() utility functions in runTask.ts and runUnitTest.ts for consistent logging.
• Misc:
  • Update processTask() in processTask.ts to pass run to runUnitTest().
  • Remove unused imports and variables in runTask.ts and runUnitTest.ts.

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