Elabore une crate pmosource

pmosource/README.md

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+# pmosource
+
+Common traits and types for PMOMusic sources.
+
+## Overview
+
+`pmosource` provides the foundational abstractions for different music sources in the PMOMusic ecosystem, such as Radio Paradise, Qobuz, and potentially others in the future.
+
+## Features
+
+- **`MusicSource` trait**: Common interface for all music sources
+- **Default images**: Standardized 300x300px WebP images embedded in binaries
+- **Source identification**: Consistent naming and ID scheme
+
+## Usage
+
+### Implementing the trait
+
+```rust
+use pmosource::MusicSource;
+
+const DEFAULT_IMAGE: &[u8] = include_bytes!("../assets/default.webp");
+
+#[derive(Debug)]
+pub struct MyMusicSource;
+
+impl MusicSource for MyMusicSource {
+    fn name(&self) -> &str {
+        "My Music Service"
+    }
+
+    fn id(&self) -> &str {
+        "my-music-service"
+    }
+
+    fn default_image(&self) -> &[u8] {
+        DEFAULT_IMAGE
+    }
+}
+```
+
+### Using a music source
+
+```rust
+use pmosource::MusicSource;
+use pmoparadise::RadioParadiseSource;
+use pmoqobuz::QobuzSource;
+
+let rp = RadioParadiseSource;
+let qobuz = QobuzSource;
+
+println!("Source: {} ({})", rp.name(), rp.id());
+println!("Image size: {} bytes", rp.default_image().len());
+```
+
+## Image Format
+
+All default images should be:
+- **Format**: WebP
+- **Dimensions**: 300x300 pixels (square)
+- **Quality**: 85 (good balance between size and quality)
+- **Location**: `<crate>/assets/default.webp`
+
+### Converting images
+
+Use the provided Python script or similar tool:
+
+```python
+from PIL import Image
+
+def convert_to_webp(input_path, output_path, size=300):
+    img = Image.open(input_path)
+
+    # Convert to RGB if necessary
+    if img.mode not in ('RGB', 'RGBA'):
+        img = img.convert('RGB')
+
+    # Make it square (center crop)
+    width, height = img.size
+    if width != height:
+        min_dim = min(width, height)
+        left = (width - min_dim) // 2
+        top = (height - min_dim) // 2
+        right = left + min_dim
+        bottom = top + min_dim
+        img = img.crop((left, top, right, bottom))
+
+    # Resize to target size
+    img = img.resize((size, size), Image.Resampling.LANCZOS)
+
+    # Save as WebP
+    img.save(output_path, 'WEBP', quality=85, method=6)
+```
+
+## Current Implementations
+
+- **pmoparadise**: Radio Paradise
+- **pmoqobuz**: Qobuz
+
+## Future Enhancements
+
+The `MusicSource` trait can be extended with additional methods such as:
+
+- Authentication status
+- Available quality levels
+- Streaming capabilities
+- Search functionality
+- Playlist management
+- And more...
+
+## License
+
+MIT OR Apache-2.0