implemented Movf Instruction (#18)

Co-authored-by: Darkress <30271678+DarkressX@users.noreply.github.com>
Reviewed-on: darkress/pic16f84-sim#18

de/darkress/pic16f84sim/decoder/CommandDecoder.java

@@ -25,8 +25,7 @@ public class CommandDecoder
             case 0x400:
                 return new Iorwf(input);
             case 0x800:
-                //movf();
-                break;
+                return new Movf(input);
             case 0xD00:
                 //rlf();
                 break;