Channel creation logic

Author: IAmNickNack

pi4j-plugin-grpc/src/main/java/io/github/iamnicknack/pi4j/grpc/client/GrpcChannelSupplier.java

@@ -7,6 +7,7 @@
     requires io.grpc.stub;
     requires jakarta.annotation;
     requires org.slf4j;
+    requires org.checkerframework.checker.qual;
 
     exports io.github.iamnicknack.pi4j.grpc.client;
     exports io.github.iamnicknack.pi4j.grpc.client.provider.gpio;