refactor<*>: rewrite all codes...

src/Commands/Remote.cs

@@ -0,0 +1,31 @@
+namespace SourceGit.Commands {
+    /// <summary>
+    ///     远程操作
+    /// </summary>
+    public class Remote : Command {
+
+        public Remote(string repo) {
+            Cwd = repo;
+        }
+
+        public bool Add(string name, string url) {
+            Args = $"remote add {name} {url}";
+            return Exec();
+        }
+
+        public bool Delete(string name) {
+            Args = $"remote remove {name}";
+            return Exec();
+        }
+
+        public bool Rename(string name, string to) {
+            Args = $"remote rename {name} {to}";
+            return Exec();
+        }
+
+        public bool SetURL(string name, string url) {
+            Args = $"remote set-url {name} {url}";
+            return Exec();
+        }
+    }
+}