[native_doc_dartifier] Getting Summary of Classes

[marshelino-maged]

Related to #2309

• Getting the summary of the classes only.
• The idea is to get the context for the LLM as

- class Foo extends _Foo
    - Constructors
    - Setters
    - Getters
    - Methods
        - int calculate()
     - Fields
        - int a
        - int b

• Why not only get the class name?
  Put the interface or abstract keyword to help the LLM not try to make an object from those classes.
  Put implements and extends because sometimes functions need an explicit class as a parameter, so the LLM needs this context so that it can pass the Foo object to this function.

class Foo implements Bar {} 
function(Bar b){}

---

• I’ve reviewed the contributor guide and applied the relevant portions to this PR.

[github-actions]

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Changelog Entry ❗

Package	Changed Files
package:native_doc_dartifier	pkgs/native_doc_dartifier/lib/src/ast.dart pkgs/native_doc_dartifier/lib/src/public_abstractor.dart pkgs/native_doc_dartifier/pubspec.yaml

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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.

Files
pkgs/native_doc_dartifier/lib/src/ast.dart
pkgs/native_doc_dartifier/lib/src/public_abstractor.dart
pkgs/native_doc_dartifier/test/public_abstractor_test.dart

All source files should start with a license header.

Unrelated files missing license headers

Files
pkgs/jni/lib/src/third_party/generated_bindings.dart
pkgs/native_doc_dartifier/example/native_doc_dartifier_example.dart
pkgs/native_doc_dartifier/lib/native_doc_dartifier.dart
pkgs/native_doc_dartifier/lib/src/native_doc_dartifier_base.dart
pkgs/objective_c/lib/src/ns_input_stream.dart

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[HosseinYousefi]

Please add the license at the beginning of all the source files:

// 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.

[HosseinYousefi]

Please add a CI workflow that runs this (and other) tests. It's probably fine to only run it on a single OS like ubuntu