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/contexts/ToolRegistryProvider.tsx

@@ -0,0 +1,44 @@
+import { useMemo } from 'react';
+
+import type { ToolId } from '@app/types/toolId';
+import type { ToolRegistry } from '@app/data/toolsTaxonomy';
+import ToolRegistryContext, { ToolRegistryCatalog } from '@app/contexts/ToolRegistryContext';
+import { useTranslatedToolCatalog } from '@app/data/useTranslatedToolRegistry';
+
+interface ToolRegistryProviderProps {
+  children: React.ReactNode;
+}
+
+export const ToolRegistryProvider: React.FC<ToolRegistryProviderProps> = ({ children }) => {
+  const catalog = useTranslatedToolCatalog();
+
+  const contextValue = useMemo<ToolRegistryCatalog>(() => {
+    const { regularTools, superTools, linkTools } = catalog;
+    const allTools: ToolRegistry = {
+      ...regularTools,
+      ...superTools,
+      ...linkTools,
+    };
+
+    const getToolById = (toolId: ToolId | null) => {
+      if (!toolId) {
+        return null;
+      }
+      return allTools[toolId] ?? null;
+    };
+
+    return {
+      regularTools,
+      superTools,
+      linkTools,
+      allTools,
+      getToolById,
+    };
+  }, [catalog]);
+
+  return (
+    <ToolRegistryContext.Provider value={contextValue}>
+      {children}
+    </ToolRegistryContext.Provider>
+  );
+};