[LED] Refactor LED handling (#2051)

Refactor LED handling into a library
Use a task instead of relying on the loop for precise timing

Co-authored-by: Florian <1technophile@users.noreply.github.com>

lib/LEDManager/README.md

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+# LEDManager Library
+
+## Overview
+
+The LEDManager library provides a flexible and easy-to-use interface for controlling LEDs in projects. It supports both addressable LED strips and individual non-addressable LEDs, offering various modes of operation such as static, blinking, and pulsing. The library is designed to work seamlessly with PlatformIO and can be easily configured using build flags.
+
+## Features
+
+- Support for both addressable LED strips and individual non-addressable LEDs
+- Multiple operation modes: OFF, STATIC, BLINK, and PULSE
+- Individual control of LEDs within each strip (for addressable LEDs)
+- Global brightness control
+- Queueing of LED states for complex sequences
+- Automatic return to previous state after temporary modes
+- Compatible with PlatformIO build flags for easy configuration
+- Customizable color schemes
+
+## Installation
+
+1. Clone this repository or download the ZIP file.
+2. Extract the contents to your PlatformIO project's `lib` directory.
+
+## Configuration
+
+Configure the LEDManager library using build flags in your `platformio.ini` file:
+
+```ini
+build_flags = 
+    ; For addressable LEDs:
+    -DLED_ADDRESSABLE=true
+    ; For non-addressable LEDs, comment out the line above
+    
+    ; Optional timing configurations:
+    -DBLINK_INTERVAL=500
+    -DPULSE_INTERVAL=30
+    -DFADE_AMOUNT=5
+```
+
+## Usage
+
+Here's a basic example of how to use the LEDManager library:
+
+```cpp
+#include "LEDManager.h"
+
+LEDManager ledManager;
+
+void setup() {
+    
+    #ifdef LED_ADDRESSABLE
+    ledManager.addLEDStrip(5, 30);  // Add addressable LED strip on pin 5 with 30 LEDs
+    #else
+    ledManager.addLEDStrip(5, 1);   // Add non-addressable LED on pin 5
+    ledManager.addLEDStrip(6, 1);   // Add non-addressable LED on pin 6
+    #endif
+    
+    ledManager.setBrightness(128); // Set global brightness to 50%
+}
+
+void loop() {
+    #ifdef LED_ADDRESSABLE
+    // Set all LEDs on the strip to static green
+    ledManager.setMode(0, -1, LEDManager::STATIC, LED_COLOR_GREEN);
+    
+    // Blink first 5 LEDs red for 3 times
+    for (int i = 0; i < 5; i++) {
+        ledManager.setMode(0, i, LEDManager::BLINK, LED_COLOR_RED, 3);
+    }
+    #else
+    // Set first LED to static green
+    ledManager.setMode(0, 0, LEDManager::STATIC, LED_COLOR_GREEN);
+    
+    // Blink second LED red
+    ledManager.setMode(1, 0, LEDManager::BLINK, LED_COLOR_RED, 3);
+    #endif
+
+    ledManager.update();
+    delay(100);
+}
+```
+
+## API Reference
+
+### Initialization and Setup
+
+```cpp
+LEDManager ledManager;
+ledManager.addLEDStrip(int pin, int numLeds);
+```
+
+### Setting LED Mode
+
+```cpp
+ledManager.setMode(int stripIndex, int ledIndex, Mode mode, uint32_t color, int durationOrBlinkCount = -1);
+```
+
+- `stripIndex`: Index of the LED strip (0-based)
+- `ledIndex`: LED index within the strip (0-based) or -1 for all LEDs in the strip (addressable LEDs only)
+- `mode`: `LEDManager::OFF`, `LEDManager::STATIC`, `LEDManager::BLINK`, or `LEDManager::PULSE`
+- `color`: Color value (use predefined colors from LEDColorDefinitions.h or custom 24-bit RGB values)
+- `durationOrBlinkCount`: Duration for STATIC mode (in milliseconds), blink/pulse count for BLINK/PULSE modes (-1 for infinite)
+
+### Setting Brightness
+
+```cpp
+ledManager.setBrightness(brightness);
+```
+
+- `brightness`: Global brightness value (0-255)
+
+### Updating LEDs
+
+Call this method in your main loop to update LED states:
+
+```cpp
+ledManager.update();
+```
+## Advanced Configuration
+
+You can customize the behavior of the LEDManager by defining the following build flags:
+
+- `BLINK_INTERVAL`: Sets the interval (in milliseconds) between blink states (default: 500)
+- `PULSE_INTERVAL`: Sets the interval (in milliseconds) between pulse updates (default: 30)
+- `FADE_AMOUNT`: Sets the increment/decrement value for pulsing (default: 5)
+
+## Contributing
+
+Contributions to the LEDManager library are welcome! Please feel free to submit a Pull Request.
+
+## License
+
+This library is released under the LGPL V3 License.