moved files out of subdirectories, added required documentation

src/monk.h

@@ -0,0 +1,14 @@
+#ifndef __MONK_H__
+#define __MONK_H__
+
+#include "player.h"
+
+class monk final: public player_base {
+        static const int GAIN_HP = 2;
+public:
+        monk(RNG *rng, const feature enabled_features);
+        const char *get_race_name() const override;
+        void start_turn() override;
+};
+
+#endif