fix: respect maxReadFileLine setting for file mentions to prevent context exhaustion

[roomote]

Summary

This PR fixes issue #6069 where Roo Code's codebase condensing feature fails when it accidentally tries to read very large source files (>5000 lines), causing a "Failed to condense" error and wiping out the task context.

Problem

When users mention files using @filename syntax, the entire file content was being read without respecting the maxReadFileLine configuration setting. This could exhaust the context window when dealing with large files, particularly problematic in Orchestrator mode.

Solution

• Modified extractTextFromFile to accept and respect the maxReadFileLine parameter
• Updated parseMentions and related functions to pass maxReadFileLine through the call chain
• Modified Task.ts to retrieve maxReadFileLine from state and pass it to processUserContentMentions
• Files are now truncated with informative messages when they exceed the line limit

Changes

1. src/integrations/misc/extract-text.ts

   • Added maxReadFileLine parameter to extractTextFromFile function
   • Implemented file truncation logic when files exceed the line limit
   • Added informative truncation message

2. src/core/mentions/index.ts

   • Updated parseMentions and getFileOrFolderContent to accept and pass maxReadFileLine
   • Modified all calls to extractTextFromFile to include the parameter

3. src/core/mentions/processUserContentMentions.ts

   • Added maxReadFileLine parameter to function signature
   • Updated all calls to parseMentions to include the parameter

4. src/core/task/Task.ts

   • Modified to retrieve maxReadFileLine from state
   • Pass the setting to processUserContentMentions

5. src/integrations/misc/tests/extract-text-large-files.spec.ts

   • Added comprehensive tests for large file handling
   • Tests cover various scenarios including truncation, edge cases, and error handling

Testing

• Added 12 new unit tests covering all scenarios
• All existing tests pass
• Linting and type checking pass

Fixes #6069