[SM-380] Access checks for listing projects (#2496)

* Add project access checks for listing

src/Core/Identity/Claims.cs

@@ -16,4 +16,7 @@ public static class Claims
 
     // Service Account
     public const string Organization = "organization";
+
+    // General
+    public const string Type = "type";
 }

src/Core/Identity/ClientType.cs

@@ -0,0 +1,8 @@
+namespace Bit.Core.Identity;
+
+public enum ClientType : byte
+{
+    User = 0,
+    Organization = 1,
+    ServiceAccount = 2,
+}