Grpc hello service implementation

api/Hello Ping.bru

@@ -0,0 +1,21 @@
+meta {
+  name: Hello Ping
+  type: grpc
+  seq: 1
+}
+
+grpc {
+  url: localhost:8081
+  method: /music_agregator.hello.v1.HelloService/Ping
+  body: grpc
+  protoPath: ../proto/music_agregator/hello/v1/service.proto
+  auth: none
+  methodType: unary
+}
+
+body:grpc {
+  name: message 1
+  content: '''
+    {}
+  '''
+}