move to 1.9

Author: npuckett

release-notes-v1.9.0.md

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+## 🎉 What's New in v1.9.0
+
+### Arduino Nano 33 IoT Support Fixed! 🔧
+This release fixes the **EEPROM.h error** on Arduino Nano 33 IoT and adds proper persistent storage support using FlashStorage.
+
+### Key Changes
+- ✅ **FlashStorage Integration**: Replaced EEPROM with FlashStorage for Nano 33 IoT (SAMD21 boards)
+- ✅ **Persistent Settings**: Full support for saveSetting() and loadSetting() on Nano 33 IoT
+- ✅ **Storage Capacity**: 10 values per type (int, float, bool, string) with 15-character keys
+- ✅ **Clear Memory**: Added FlashStorage support in clearMemory() function
+- ✅ **Backward Compatible**: Maintains full compatibility with ESP32 (Preferences) and UNO R4 WiFi (EEPROM)
+
+### Installation
+The FlashStorage library is now listed as a dependency. Install it via Arduino Library Manager:
+1. Go to **Sketch** → **Include Library** → **Manage Libraries**
+2. Search for "FlashStorage"
+3. Install **FlashStorage** by cmaglie
+
+### Bug Fixes
+- Fixed compilation error: `fatal error: EEPROM.h: No such file or directory` on Nano 33 IoT
+- Added proper platform-specific includes for SAMD21 architecture
+
+### Documentation
+- Updated README with FlashStorage installation instructions
+- Added notes about Nano 33 IoT requirements
+
+### Compatibility
+- ✅ Arduino UNO R4 WiFi
+- ✅ Arduino Nano 33 IoT (now with FlashStorage!)
+- ✅ ESP32 (all variants)
+
+### Breaking Changes
+None - fully backward compatible with v1.8.x
+
+---
+
+**Full Changelog**: https://github.com/npuckett/WebGUI/compare/v1.8.5...v1.9.0