Add Formbricks configuration to environment files and update package dependencies

- Introduced new environment variables for Formbricks in .env.backup and .env.example.
- Updated package.json and yarn.lock to include React and related types for improved functionality.
- Added new favicon images and manifest for better branding and user experience.
- Implemented new Svelte components for enhanced content management, including Badge, Card, OrganisationsBlock, and OpnFormBlock.
- Updated ContentRows component to support new block types.

package.json

@@ -27,6 +27,9 @@
     "astro": "^6.1.1",
     "json5": "^2.2.3",
     "marked": "^17.0.2",
+    "react": "^19.2.4",
+    "react-dom": "^19.2.4",
+    "react-photo-album": "^3.5.1",
     "svelte": "^5.51.2",
     "tailwindcss": "^4.1.18"
   },
@@ -35,6 +38,8 @@
     "@storybook/svelte": "10",
     "@storybook/svelte-vite": "10",
     "@types/node": "^22.10.0",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
     "astro-icon": "^1.1.5",
     "firebase": "^11.0.1",
     "openapi-typescript": "^7.4.0",