Add version c file that includes a generated file during build

stm-firmware/include/reflow-controller/version.h

@@ -0,0 +1,27 @@
+/* Reflow Oven Controller
+ *
+ * Copyright (C) 2022  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of the Reflow Oven Controller Project.
+ *
+ * The reflow oven controller is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The Reflow Oven Control Firmware 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the reflow oven controller project.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _VERSION_H_
+#define _VERSION_H_
+
+extern const char *git_version_string;
+extern const char *git_full_commit_string;
+
+#endif /* _VERSION_H_ */