GOOD Refactor GUI components and add PlainSlider widget

- Added a new `PlainSlider` widget for keyboard-editable numeric sliders.
- Updated various panels to utilize the new `PlainSlider` for better user interaction.
- Removed unused code and dead code warnings across multiple files.
- Improved organization of modules by adding a `widgets` module.
- Cleaned up imports in several files to streamline the codebase.
- Added Qodana configuration file for code analysis and quality checks.

hcie-composite/src/parallel.rs

@@ -1,5 +1,4 @@
 use hcie_blend::blend_pixels;
-use hcie_fx::protocol_to_hcie_fx_effect;
 use hcie_protocol::Layer;
 use rayon::prelude::*;
 

hcie-composite/src/tiled.rs

@@ -1,6 +1,5 @@
 use hcie_blend::blend_pixels;
 use hcie_fx::apply_layer_effects;
-use hcie_fx::protocol_to_hcie_fx_effect;
 use hcie_protocol::Layer;
 use hcie_tile::{TiledLayer, TILE_SIZE};
 use rayon::prelude::*;