feature: test if conflicts have been resolved manually (#96)

src/Commands/IsConflictResolved.cs

@@ -0,0 +1,20 @@
+namespace SourceGit.Commands
+{
+    public class IsConflictResolved : Command
+    {
+        public IsConflictResolved(string repo, Models.Change change) 
+        {
+            var opt = new Models.DiffOption(change, true);
+
+            WorkingDirectory = repo;
+            Context = repo;
+            Args = $"diff -a --ignore-cr-at-eol --check {opt}";
+        }
+
+        public bool Result()
+        {
+            var rs = ReadToEnd();
+            return rs.IsSuccess;
+        }
+    }
+}