fix(react-router): Ensure custom cookie transformers are used exclusively

[rururux]

fixes: #13751

This commit fixes a bug where createCookie was applying its default transformations even when custom encode and decode functions were provided.
This led to an unintended double-encoding of cookie values.

The fix ensures that if custom encode and decode functions exist in the cookie options, the default transformations are completely bypassed.
This aligns the createCookie API with its intended behavior: allowing developers to take full control of the serialization and deserialization process.

[changeset-bot]

🦋 Changeset detected

Latest commit: e85393c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
react-router	Patch
@react-router/architect	Patch
@react-router/cloudflare	Patch
@react-router/dev	Patch
react-router-dom	Patch
@react-router/express	Patch
@react-router/node	Patch
@react-router/serve	Patch
@react-router/fs-routes	Patch
@react-router/remix-routes-option-adapter	Patch
create-react-router	Patch

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