chore(hedera): update package.json exports to support Typescript bundler module resolution

[mehcode]

📦 Pull Request

TypeScript bundler module resolution requires the following change to work. Otherwise TypeScript cannot read the type definitions.

error TS7016: Could not find a declaration file for module '@magic-ext/hedera'. '/Users/mehcode/.../node_modules/.pnpm/@[email protected]_@[email protected]/node_modules/@magic-ext/hedera/dist/es/index.mjs' implicitly has an 'any' type.
  There are types at '/Users/mehcode/.../node_modules/@magic-ext/hedera/dist/types/index.d.ts', but this result could not be resolved when respecting package.json "exports". The '@magic-ext/hedera' library may need to update its package.json or typings.

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• patch: Bug Fix?