Add ranks

ranks.proto

@@ -0,0 +1,56 @@
+syntax = "proto3";
+
+import "users.proto";
+
+option go_package = "git.itzana.me/strafesnet/go-grpc/ranks";
+
+package ranks;
+
+service RanksService {
+  rpc Get(GetRequest) returns (RankMessage);
+  rpc List(ListRequest) returns (RankList);
+  rpc Delete(IdMessage) returns (IdMessage);
+}
+
+message IdMessage {
+  int64 ID = 1;
+}
+
+message GetRequest {
+  int64 UserID = 1;
+  int32 StyleID = 2;
+  int32 GameID = 3;
+  int32 ModeID = 4;
+}
+
+message ListRequest {
+  int32 StyleID = 1;
+  int32 GameID = 2;
+  int32 ModeID = 3;
+  int64 Sort = 4;
+  Pagination Page = 5;
+}
+
+message RankList {
+  repeated RankMessage ranks = 1;
+}
+
+message RankMessage {
+  int64 ID = 1;
+  users.UserResponse User = 2;
+  int32 StyleID = 3;
+  int32 ModeID = 4;
+  int32 GameID = 5;
+  double Rank = 6;
+  double Skill = 7;
+  int64 UpdatedAt = 8;
+}
+
+message Pagination {
+  int32 Size = 1;
+  int32 Number = 2;
+}
+
+message NullResponse {
+
+}