Add comparison framework for autofill detection techniques

Author: codegen-sh[bot]

docs/autofill-detection-techniques.md

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+# Autofill Detection Techniques Comparison
+
+This document provides a comparison of different techniques for detecting browser autofill events in web forms.
+
+## Overview
+
+Browser autofill is a convenient feature that automatically fills in form fields with previously saved information. However, it presents challenges for developers:
+
+1. **Inconsistent behavior** across browsers (Chrome, Firefox, Safari)
+2. **Limited events** - browsers don't provide standard events for autofill
+3. **Styling challenges** - autofilled inputs have browser-specific styling
+4. **Validation integration** - autofilled values may bypass validation
+
+## Detection Techniques
+
+We'll explore the following techniques for detecting when a browser has autofilled form fields:
+
+1. **Value comparison with useRef**
+   - Track initial and current values to detect changes not triggered by user input
+   - Implementation in `feature/autofill-value-comparison` branch
+
+2. **CSS Animation Detection**
+   - Use CSS animations and `animationstart` event to detect autofill-specific animations
+   - Implementation in `feature/autofill-css-animation` branch
+
+3. **Form State Monitoring**
+   - Monitor form state changes to detect unexpected value changes
+   - Implementation in `feature/autofill-form-state` branch
+
+4. **Controlled Inputs with useController**
+   - Use controlled inputs with React Hook Form's useController to detect value changes
+   - Implementation in `feature/autofill-controlled-inputs` branch
+
+## Comparison Criteria
+
+Each technique will be evaluated based on:
+
+1. **Browser Compatibility** - How well it works across Chrome, Firefox, Safari
+2. **Reliability** - Consistency of detection
+3. **Performance Impact** - Any noticeable performance issues
+4. **Implementation Complexity** - How difficult it is to implement
+5. **Maintenance Overhead** - Long-term maintenance considerations
+
+## Implementation Notes
+
+Each technique will be implemented in a separate branch with:
+- A Storybook demo showing the technique in action
+- Documentation of browser-specific behavior
+- Integration with form validation
+- Styling hooks for autofilled inputs
+
+## Recommendations
+
+Based on the comparison, we'll provide recommendations for:
+- Best overall technique for most use cases
+- Browser-specific considerations
+- Fallback strategies for browsers with limited support
+