[hooks] LinkInput Mark the record uses file as experimental

[dcharkes]

I'm not convinced that we'll keep the current API (a file path) for record use.

• We might want to simply have the Dart API directly. (Possibly async via a future. Possibly as an extension method on top of the LinkInput in package:record_use.)
  • Then we could solve caching transparently ([native_assets_builder][record_use] Resources.json and caching #1178)
  • Then we could have a clearer story about the versioning of the API and JSON

Let's just mark it experimental for now, then we are allowed to change it and break people who rely on it.

[github-actions]

PR Health

Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
hooks	None	0.20.2	0.20.2	0.20.2	✔️

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License Headers ✔️

// Copyright (c) 2025, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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pkgs/objective_c/lib/src/ns_input_stream.dart

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[github-actions]

PR Health

Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
hooks	None	0.20.2	0.20.2	0.20.2	✔️

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API leaks ✔️

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License Headers ✔️

// Copyright (c) 2025, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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pkgs/objective_c/lib/src/ns_input_stream.dart

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[coveralls]

coverage: 81.229% (+0.001%) from 81.228%
when pulling 8f12384 on mark-experiment
into c76ea57 on main.