Refactor PWA caching and image generation scripts

- Updated `generate-pwa-cache-list.js` to include images directory and remove duplicate file entries.
- Refactored `generate-svg-variants.js` to utilize collections from a centralized source and renamed generation directory variable.
- Modified `update-data.js` to align with new directory structure for images and variants, ensuring proper paths are used.
- Adjusted `collections.js` to standardize directory naming for variants.
- Enhanced Svelte components (`Actions.svelte`, `CardFull.svelte`, `CardMiddle.svelte`, `CardSmall.svelte`, `CardTiny.svelte`) to utilize context for collection management, simplifying image URL generation.

src/collections.js

@@ -4,21 +4,21 @@ export const collections = [
         name: 'logos',
         label: 'Logos',
         baseDir: 'images/logos',
-        genDir: 'images/logos_variants',
+        varDir: 'images/logos_variants',
         dataFile: 'data/logos.json'
     },
     {
         name: 'flags',
         label: 'Flags',
         baseDir: 'images/flags',
-        genDir: 'images/flags_variants',
+        varDir: 'images/flags_variants',
         dataFile: 'data/flags.json'
     },
     {
         name: 'emblems',
         label: 'Emblems',
         baseDir: 'images/emblems',
-        genDir: 'images/emblems_variants',
+        varDir: 'images/emblems_variants',
         dataFile: 'data/emblems.json'
     }
 ];