feat: simple read_file tool for single-file-only models

[daniel-lxs]

Adds a simplified read_file tool and routes it by model.

• New: simpleReadFileTool using <read_file>...</read_file>
• Routing: selects simple vs multi-file via shouldUseSingleFileRead(modelId)
• Config: SINGLE_FILE_READ_MODELS now in @roo-code/types (includes "roo/sonic")
• Prompts: show simple or multi-file instructions accordingly
• Consistency: uses the same askApproval flow as the existing tool

---

Important

Introduces simpleReadFileTool for single-file reads, routing logic, and configuration for specific models, with updates to prompts and tool descriptions.

• Behavior:
  • Adds simpleReadFileTool in simpleReadFileTool.ts for single-file reads using <read_file><path>...</path></read_file> format.
  • Routes to simpleReadFileTool or readFileTool based on shouldUseSingleFileRead(modelId) in presentAssistantMessage.ts.
• Configuration:
  • Introduces SINGLE_FILE_READ_MODELS in single-file-read-models.ts to list models using single-file reads.
  • Adds shouldUseSingleFileRead() function in single-file-read-models.ts for model ID checks.
• Prompts:
  • Updates generatePrompt() and SYSTEM_PROMPT in system.ts to include modelId for tool description selection.
  • Modifies getToolDescriptionsForMode() in tools/index.ts to choose between simple and regular read file descriptions based on model ID.
• Misc:
  • Adds getSimpleReadFileToolDescription() in simple-read-file.ts for generating tool descriptions.
  • Ensures consistent approval flow with existing tools.

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[roomote]

Thank you for your contribution! I've reviewed the changes and found some issues that need attention. The implementation looks good overall, but there are critical gaps in test coverage and some opportunities for improvement.

[UriZafrir]

could you explain why you chose grok-code-fast not to use the regular read_line tool? as it can't read parts of file at the moment..