Enhance component functionality and styling across the project

- Updated .gitignore to include raw image files for better asset management.
- Added optional icon and color properties to Tag and TagItem interfaces for improved tag customization.
- Enhanced BlogOverview and PostCard components to support new tag features, including icon and color display.
- Refined Card component to accept target and rel attributes for better link handling.
- Improved layout responsiveness in ContentRows and PostCard components.
- Updated OrganisationsBlock to include a new CTA link feature for adding organizations.
- Enhanced QuoteBlock styling for better visual emphasis on quotes.
- Refactored image handling in various components to ensure consistent display and performance.
- Introduced utility functions for resolving body content and filtering hidden posts in blog utilities.

src/components/BlogOverview.svelte

@@ -10,6 +10,8 @@
   interface TagEntry {
     _slug?: string;
     name: string;
+    icon?: string;
+    color?: string;
   }
 
   let {
@@ -62,6 +64,8 @@
             href={tagHref(slug)}
             variant={activeTag === slug ? "inactive" : "green"}
             active={activeTag === slug}
+            icon={tag.icon?.trim() || null}
+            customColor={activeTag === slug ? null : tag.color?.trim() || null}
           />
         {/each}
       </div>
@@ -75,7 +79,7 @@
     activeTag={activeTag}
   />
 
-  <div class="py-2 grid grid-cols-1 gap-4">
+  <div class="py-2 grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3">
     {#each posts as post}
       <PostCard
         post={post}