[BUG] - write file tool uses `\n` instead of newlines

[cmrigney]

Describe the bug

Sometimes the file writing tool writes \n instead of actual newlines.

Version affected

cagent version v1.0.2
Build time: 2025-09-03T15:46:35Z
Commit: a2c9336

How To Reproduce

Detailed steps to reproduce the behavior:

1. Run the golang_developer.yaml agent
2. Tell it to write some new documentation
3. It might include \ns

Expectation

All the \ns should be newlines.

Screenshots

OS and Terminal type

Mac OS
Warp

Additional context

Any other info you consider useful can be included here