Provides Dart Build System builder for creating Injection pattern using annotations.

Describe the bug There is a dependency conflict with path & flutter_test packages.

Because every version of flutter_test from sdk depends on path 1.8.0 and every version of gate_generator from path depends on path ^1.8.1, flutter_test from sdk is incompatible with gate_generator from path.
So, because gate_example depends on both gate_generator from path and flutter_test from sdk, version solving failed.
pub get failed (1; So, because gate_example depends on both gate_generator from path and flutter_test from sdk, version solving failed.)
exit code 1

To Reproduce Open the example of gate, run flutter pub get. Error appear.

Expected behavior Pub get work

Describe the bug An empty line appear in each file Gate is used after executing the flutter pub build command ran:

flutter pub run build_runner build --delete-conflicting-outputs

To Reproduce Steps to reproduce the behavior: 1- Add gate to a file 2- Run flutter pub run build_runner build --delete-conflicting-outputs 3- Empty line should appear in the file

Expected behavior No empty line in files.

• Generate imports for inject annotations.
• Changed Injected child annotation type argument from String to DartType
• Provide Part of into source inject if not found

Singleton services are init only on the first time we use it (injected). Maybe we could force this to be init on app start if we need to.

Proposition :

• add a initOnAppStart option insite the singleton annotation