feat: Implement collection support for logos and flags in the gallery

src/collections.js

@@ -0,0 +1,20 @@
+// This file lists all supported collections for the gallery
+export const collections = [
+    {
+        name: 'logos',
+        label: 'Logos',
+        baseDir: 'logos',
+        genDir: 'logos_gen',
+        dataFile: 'data/logos.json'
+    },
+    {
+        name: 'flags',
+        label: 'Flags',
+        baseDir: 'flags',
+        genDir: 'flags_gen',
+        dataFile: 'data/flags.json'
+    }
+];
+if (typeof module !== 'undefined' && module.exports) {
+    module.exports = { collections };
+}