- Started interface for renderers

- Renamed fproc -> langproc (I'll probably never settle on a naming convention for this)
 - Refactored set to use median psl

include/fennec/core/system.h

@@ -0,0 +1,47 @@
+// =====================================================================================================================
+//  fennec, a free and open source game engine
+//  Copyright © 2025  Medusa Slockbower
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  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 for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+// =====================================================================================================================
+
+#ifndef FENNEC_CORE_SYSTEM_H
+#define FENNEC_CORE_SYSTEM_H
+#include <fennec/langproc/strings/string.h>
+
+namespace fennec
+{
+
+class system {
+public:
+	using tick_f  = void (*)(system*, double);
+	using frame_f = void (*)(system*, size_t);
+
+	const string  name;
+	const tick_f  tick;
+	const frame_f frame;
+
+	system(const cstring& name, tick_f tick, frame_f frame)
+		: name(name), tick(tick), frame(frame) {
+	}
+
+	virtual ~system() = default;
+
+	virtual void init()     = 0;
+	virtual void shutdown() = 0;
+};
+
+}
+
+#endif // FENNEC_CORE_SYSTEM_H