fix: add timeout mechanism for OpenRouter stream hanging issue

[roomote]

This PR fixes issue #6137 where Roo Code gets stuck with a spinning indicator when using OpenRouter with Claude Sonnet 4.

Problem

Users were experiencing indefinite hanging when using OpenRouter as their API provider. The application would show a spinning indicator and never proceed after displaying the file list.

Solution

Added timeout mechanisms to prevent OpenRouter streams from hanging:

1. First chunk timeout (30 seconds): Added a timeout specifically for OpenRouter in Task.ts that prevents the first chunk await from hanging indefinitely
2. Stream chunk timeout (60 seconds): Added monitoring in OpenRouterHandler to detect when no data has been received for an extended period
3. Clear error messages: When timeouts occur, users now receive informative error messages explaining the issue and suggesting alternatives

Changes

• Modified src/core/task/Task.ts to add timeout logic for OpenRouter first chunk
• Modified src/api/providers/openrouter.ts to add stream timeout monitoring
• All tests pass and linting issues have been resolved

Testing

• Ran unit tests for both modified files
• All type checks pass
• Linting passes with no warnings

Fixes #6137

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Important

Adds timeout mechanisms in Task.ts and openrouter.ts to prevent OpenRouter stream hanging, with clear error messages for users.

• Behavior:
  • Adds a 30-second timeout for the first chunk in Task.ts to prevent indefinite hanging with OpenRouter.
  • Implements a 60-second timeout between stream chunks in OpenRouterHandler in openrouter.ts.
  • Provides clear error messages to users when timeouts occur, suggesting alternatives.
• Files Modified:
  • Task.ts: Adds timeout logic for OpenRouter's first chunk.
  • openrouter.ts: Adds stream timeout monitoring.
• Testing:
  • All unit tests pass.
  • Type checks and linting pass with no warnings.

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[daniel-lxs]

This fix is too specific, the issue doesn't have enough information to propose a fix just yet