Restructure frontend code to allow for extensions (#4721)

# Description of Changes
Move frontend code into `core` folder and add infrastructure for
`proprietary` folder to include premium, non-OSS features

frontend/src/core/utils/toolSynonyms.ts

@@ -0,0 +1,24 @@
+import { TFunction } from 'i18next';
+
+// Helper function to get synonyms for a tool (only from translations)
+export const getSynonyms = (t: TFunction, toolId: string): string[] => {
+  try {
+    const tagsKey = `${toolId}.tags`;
+    const tags = t(tagsKey) as unknown as string;
+
+    // If the translation key doesn't exist or returns the key itself, return empty array
+    if (!tags || tags === tagsKey) {
+      return [];
+    }
+
+    // Split by comma and clean up the tags
+    return tags
+      .split(',')
+      .map((tag: string) => tag.trim())
+      .filter((tag: string) => tag.length > 0);
+  } catch (error) {
+    console.warn(`Failed to get translated synonyms for tool ${toolId}:`, error);
+    return [];
+  }};
+
+