added simulation file for actually performing sim

src/simulation.h

@@ -0,0 +1,33 @@
+/* simulation.h: Simulation
+ * Created: 2026-03-17
+ * Author: Aryadev Chavali
+ * License: See end of file
+ */
+
+#ifndef SIMULATION_H
+#define SIMULATION_H
+
+#include "bf.h"
+
+typedef struct
+{
+  bf_token memory[NUM_PROGRAMS * SIZEOF_PROGRAM];
+} simulation_t;
+
+void simulation_iterate(simulation_t *sim);
+void simulation_draw(simulation_t *sim);
+
+#endif
+
+/* Copyright (C) 2026 Aryadev Chavali
+
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License Version 2 for
+ * details.
+
+ * You may distribute and modify this code under the terms of the GNU General
+ * Public License Version 2, which you should have received a copy of along with
+ * this program.  If not, please go to <https://www.gnu.org/licenses/>.
+
+ */