Feature Request: Add option to force Amazon Q CLI to read full files

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue

### Operating system

macOS 15.5.0 (24F74)

### Expected behaviour

Amazon Q CLI should have an option (e.g., a flag or setting) to force reading the entire file content, providing complete context of the codebase. This would help Amazon Q understand the full scope of existing functions, classes, and implementations to avoid duplications and provide better code suggestions. For example, a --full-context flag or configuration setting that ensures complete file analysis.

This feature would be particularly valuable for:
• Large codebases with many functions
• Avoiding duplicate implementations
• Better understanding of existing code structure
• More accurate refactoring suggestions
• Comprehensive code analysis
• Suggested implementation (like a --full-context flag)

The template includes conversation context to help the development team understand your use case.

### Actual behaviour

--

### Steps to reproduce

_No response_

La issue non indica file, test o punti di ingresso. Inizia esaminando come la CLI legge il contesto dei file e come sono definiti i flag o le impostazioni esistenti; il lavoro è completato quando un’opzione concordata può richiedere il contesto dell’intero file, è documentata e il comportamento risultante ha una copertura.

Scritto dal modello di indicizzazione a partire dal testo della issue.