added NuGetPackageTarget.SignalR & Set TargetPriority

resolves https://github.com/abpframework/abp/issues/4140

framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectModification/NuGetPackageTarget.cs

@@ -11,6 +11,7 @@
         HttpApiClient = 6,
         Web = 7,
         EntityFrameworkCore = 8,
-        MongoDB = 9
+        MongoDB = 9,
+        SignalR = 10
     }
 }

framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectModification/ProjectFinder.cs

@@ -41,6 +41,10 @@ namespace Volo.Abp.Cli.ProjectModification
                     return FindProjectEndsWith(projectFiles, assemblyNames, ".HttpApi");
                 case NuGetPackageTarget.HttpApiClient:
                     return FindProjectEndsWith(projectFiles, assemblyNames, ".HttpApi.Client");
+                case NuGetPackageTarget.SignalR:
+                    return FindProjectEndsWith(projectFiles, assemblyNames, ".SignalR") ??
+                           FindProjectEndsWith(projectFiles, assemblyNames, ".Web") ??
+                           FindProjectEndsWith(projectFiles, assemblyNames, ".HttpApi.Host");
                 default:
                     return null;
             }