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-io/examples/analyze_bevel_emboss.rs

@@ -80,7 +80,7 @@ fn main() {
             &alpha, CANVAS, CANVAS,
             s.depth, s.size, s.soften, 120.0, s.altitude,
             &dir_enum, &hcie_fx::types::Technique::Smooth, &style_enum,
-            best_lb, best_hl, best_sh, 1.0,
+            best_lb, best_hl, best_sh, 1.0, 1.0,
         );
 
         let px = npix();

hcie-io/examples/inspect_diff.rs

@@ -1,5 +1,3 @@
-use image::GenericImageView;
-
 fn main() {
     let ref_img = image::open("_images/_psd_stil_test/test_2/Emboss.png")
         .unwrap()

hcie-io/examples/tune_mae_bevel_emboss_kra_grid.rs

@@ -127,7 +127,7 @@ fn main() {
                         &rect_alpha, unsafe { CANVAS }, unsafe { CANVAS },
                         s.depth, s.size, s.soften, s.angle, 30.0,
                         &dir_enum, &hcie_fx::types::Technique::Smooth, &style_enum,
-                        lighting_blur, hl_scale, sh_scale, profile_exp,
+                        lighting_blur, hl_scale, sh_scale, profile_exp, 1.0,
                     );
 
                     let px = npix();