[google_fonts] support material ui

[Segatti]

Added Material UI support to Google Fonts.

List which issues are fixed by this PR. You must list at least one issue.

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• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I linked to at least one issue that this PR fixes in the description above.
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• I added new tests to check the change I am making, or I have commented below to indicate which test exemption this PR falls under¹.
• All existing and new tests are passing.

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[gemini-code-assist]

Code Review

This pull request replaces standard Flutter SDK imports (package:flutter/material.dart and package:flutter/cupertino.dart) with external third-party packages (package:material_ui/material_ui.dart and package:cupertino_ui/cupertino_ui.dart) and adds them as dependencies in pubspec.yaml. The reviewer flags these changes as critical security and correctness issues, noting that replacing built-in Flutter SDK libraries with external packages introduces supply chain risks and breaks compatibility, and recommends reverting back to the standard Flutter SDK libraries.

[gemini-code-assist]

Replacing the standard Flutter SDK dependencies with external third-party packages like cupertino_ui and material_ui is a critical security and correctness issue. Flutter's Material and Cupertino libraries are built directly into the Flutter SDK. Using external packages instead of the official SDK libraries introduces severe security risks (such as supply chain attacks or typosquatting) and breaks compatibility.

  flutter:
    sdk: flutter
  http: ^1.0.0

[gemini-code-assist]

Do not import material_ui from an external package. Use the standard Flutter SDK Material library instead.

Suggested change

	import 'package:material_ui/material_ui.dart';
	import 'package:flutter/material.dart';

[gemini-code-assist]

Do not import cupertino_ui or material_ui from external packages. Use the standard Flutter SDK Cupertino and Material libraries instead.

Suggested change

	import 'package:cupertino_ui/cupertino_ui.dart';
	import 'package:material_ui/material_ui.dart';
	import 'package:flutter/cupertino.dart';
	import 'package:flutter/material.dart';