Fix: Improve bash tool timeout and output handling

[xhuw]

My attempt to resolve #1721

2 key changes:

1. Detects timeouts and report to the LLM
2. create separate output for the LLM which identifies the stdout, stderr, exitCode and timeout

10 minute max timeout is still too short. I am not sure why its there though so not changing it

[github-actions]

AGENTS.md Guidelines Review

I've reviewed this PR against the guidelines in AGENTS.md and found several suggestions for improvement. These are suggestions to help maintain code consistency - you can decide whether to address them.

Main Violations Found:

1. Multiple let statements (lines 133, 134, 136, 137, 147, 157, 193) - The guidelines recommend avoiding let statements where possible. Consider using const with objects to track mutable state.

2. Use of else if statements (lines 195-202) - The guidelines recommend avoiding else statements unless necessary.

Suggested Improvements:

For the mutable variables:

const terminatedState = { terminated: false, byTimeout: true }
const outputState = { stderr: "", stdout: "" }  
const sizeState = { stdout: 0, stderr: 0 }

For the conditional logic:

const baseOutput = `<stdout>${stdout}</stdout>\n<stderr>${stderr}</stderr>\n<exitCode>${process.exitCode}</exitCode>`

const timeoutMessage = terminated && terminatedByTimeout 
  ? `\n<timeout>Process was terminated by timeout after ${timeout}ms...</timeout>`
  : ''

const truncatedMessage = terminated && (stdoutSize >= MAX_OUTPUT_LENGTH || stderrSize >= MAX_OUTPUT_LENGTH) && !terminatedByTimeout
  ? `\n<outputTruncated>Output was truncated to ${MAX_OUTPUT_LENGTH} characters...</outputTruncated>`
  : ''

const forLLM = baseOutput + timeoutMessage + truncatedMessage

These are suggestions - feel free to keep the current approach if it works better for your use case!

[xhuw]

In response to the bot above:

1. I think let makes sense as they are simple values which I am mutating. not a TS expert though
2. else is required here as the only way to determine the difference between maxBuffer error and timeout error is if the output size is less than maxBuffer. hence else