Refactor logo image handling across components

- Introduced utility functions to determine the base directory and image URL for logos based on their collection.
- Updated `Actions.svelte`, `CardFull.svelte`, `CardMiddle.svelte`, `CardSmall.svelte`, and `CardTiny.svelte` to use the new utility functions for generating image paths.
- Ensured that the correct image format (SVG, PNG, JPG) is used based on the logo's properties and active color sets.

public/images/flags/ch.svg

@@ -0,0 +1,9 @@
+<svg xmlns="http://www.w3.org/2000/svg" id="flag-icons-ch" viewBox="0 0 640 480">
+  <g fill-rule="evenodd" stroke-width="1pt">
+    <path fill="red" d="M0 0h640v480H0z"/>
+    <g fill="#fff">
+      <path d="M170 195h300v90H170z"/>
+      <path d="M275 90h90v300h-90z"/>
+    </g>
+  </g>
+</svg>