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/logos/mattermost-icon.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 256 256">
+    <path fill="currentColor"
+        d="M6.791 86.965C25.235 32.482 76.783-1.432 131.421.046L113.91 20.74C81.496 26.6 53.507 48.735 42.507 81.23c-16.366 48.347 11.066 101.317 61.272 118.315c50.207 16.994 104.174-8.421 120.54-56.766c10.965-32.387 2.27-66.847-19.756-91.18l-1.346-27.169c44.154 32.048 64.406 90.205 45.991 144.6c-22.662 66.941-95.298 102.837-162.24 80.176c-66.94-22.662-102.837-95.299-80.177-162.24m158.394-75.041a2.96 2.96 0 0 1 2.137-.098a2.97 2.97 0 0 1 1.614 1.334l.072.116l.064.134c.168.321.311.69.378 1.141c.132.89.192 2.985.216 5.13l.005.585c.006.683.009 1.36.01 1.994v.532c-.002 1.735-.017 3.035-.017 3.035l.503 18.933l.744 21.855l.927 37.98v.083l.001.045v.121c-.007 2.17-.452 18.049-11.717 29.085c-12.112 11.866-26.99 10.78-36.67 7.504c-9.68-3.278-22.158-11.453-24.572-28.237c-2.052-14.266 5.533-26.257 7.854-29.533l.155-.217c.316-.438.5-.668.5-.668l23.808-29.606l13.868-16.91l11.9-14.734s1.75-2.345 3.551-4.653l.36-.46a111 111 0 0 1 1.718-2.141l.305-.366c.444-.527.82-.952 1.085-1.208c.308-.3.625-.494.935-.645l.227-.116Z" />
+</svg>