fix: replace inline type modifiers with export type block (#1062)

## Summary

- `rollup-plugin-typescript2` with rollup v3 fails to parse the inline
`type` modifier in named export lists (e.g. `export { type Foo, Bar }`)
— a TypeScript 4.5 feature not understood by rollup v3's acorn parser
- This caused the CI build to fail with `RollupError: Unexpected token`
at `src/index.tsx:45`
- Moves all type-only exports from inline modifiers into a separate
`export type { }` statement (TypeScript 3.8, fully supported by the
current toolchain)
- Public API is unchanged — all the same types are exported

## Test plan

- [ ] `npm run build` passes locally
- [ ] CI passes on this PR
- [ ] After merging, comment `@dependabot rebase` on #1061 so it picks
up this fix

Author: yogeshchoudhary147

src/index.tsx

@@ -42,30 +42,13 @@ export {
   MissingRefreshTokenError,
   GenericError,
   UseDpopNonceError,
-  type FetcherConfig,
   RedirectConnectAccountOptions,
   ConnectAccountRedirectResult,
   ResponseType,
   ConnectError,
-  type InteractiveErrorHandler,
   CustomTokenExchangeOptions,
   TokenEndpointResponse,
   ClientConfiguration,
-  // MFA Types
-  type MfaApiClient,
-  type Authenticator,
-  type MfaFactorType,
-  type EnrollParams,
-  type EnrollOtpParams,
-  type EnrollSmsParams,
-  type EnrollVoiceParams,
-  type EnrollEmailParams,
-  type EnrollPushParams,
-  type EnrollmentResponse,
-  type ChallengeAuthenticatorParams,
-  type ChallengeResponse,
-  type VerifyParams,
-  type EnrollmentFactor,
   // MFA Errors
   MfaError,
   MfaListAuthenticatorsError,
@@ -74,4 +57,23 @@ export {
   MfaVerifyError,
   MfaEnrollmentFactorsError,
 } from '@auth0/auth0-spa-js';
+export type {
+  FetcherConfig,
+  InteractiveErrorHandler,
+  // MFA Types
+  MfaApiClient,
+  Authenticator,
+  MfaFactorType,
+  EnrollParams,
+  EnrollOtpParams,
+  EnrollSmsParams,
+  EnrollVoiceParams,
+  EnrollEmailParams,
+  EnrollPushParams,
+  EnrollmentResponse,
+  ChallengeAuthenticatorParams,
+  ChallengeResponse,
+  VerifyParams,
+  EnrollmentFactor,
+} from '@auth0/auth0-spa-js';
 export { OAuthError } from './errors';