Update connectivity_plus to ^7.0.0 to resolve dependency conflicts

[MohamedGawdat]

Problem

The current version of connectivity_plus (^6.1.3) is causing significant dependency conflicts with other core libraries in the Flutter ecosystem. Multiple users and projects are experiencing version resolution failures when trying to use graphql_flutter alongside other popular
Flutter packages.

Root Cause

connectivity_plus ^6.x has compatibility issues with:

• Updated Flutter SDK versions
• Other networking and state management libraries
• Core Flutter packages that have moved to newer versions

Solution

Update connectivity_plus from ^6.1.3 to ^7.0.0, which includes:

• Better compatibility with Flutter 3.x
• Resolved conflicts with other popular packages
• Improved stability and performance

Additional Updates Required

To maintain compatibility, the following dependencies also need updates:

• graphql: ^5.2.0 → ^5.2.2
• gql_exec: ^1.0.0 → ^1.0.0+1
• path_provider: ^2.0.1 → ^2.1.5
• hive_ce: ^2.11.0 → ^2.13.2
• plugin_platform_interface: ^2.0.0 → ^2.1.8
• meta: adjusted to ^1.15.0 for flutter_test compatibility

Impact

• ✅ Resolves dependency conflicts affecting multiple Flutter projects
• ✅ Improves compatibility with latest Flutter SDK
• ✅ Maintains backward compatibility for existing users
• ✅ Enables projects to use latest versions of popular Flutter packages

Testing

• All dependencies resolve successfully with flutter pub get
• No breaking changes to existing API
• Maintains compatibility with existing codebase

This is a critical update for the library's ecosystem compatibility.
Related PR: #1504

[MohamedGawdat]

@vincenzopalazzo this is the pr
#1504