Externalise router dom deps

[manikandan-ravikumar]

react-router-dom deps needs to be externalized to avoid react being bundled into the output
#247

BTW, the nosto-react library includes the following deps

── @nosto/nosto-js@1.0.9
├── @testing-library/jest-dom@6.6.3
├── @testing-library/react@16.1.0
├── @testing-library/user-event@14.5.2
├── @types/react-dom@18.3.1
├── @types/react@18.3.12
├── @types/user-event@4.1.3
├── @vitejs/plugin-react@4.3.4
├── eslint-plugin-promise@7.2.1
├── eslint-plugin-react@7.37.2
├── eslint@9.17.0
├── prettier@3.4.2
├── react-dom@18.3.1
├── react-router-dom@7.0.2
├── react-router@7.0.2
├── react@18.3.1
├── rimraf@6.0.1
├── typedoc@0.27.5
├── typescript-eslint@8.18.1
├── typescript@5.7.2
├── vite-plugin-dts@4.3.0
├── vite@6.0.3
└── vitest@2.1.8