docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/A/AMMO_DATA.h

@@ -0,0 +1,15 @@
+#pragma once
+
+namespace RE
+{
+	class AMMO_DATA
+	{
+	public:
+		// members
+		BGSProjectile* projectile;  // 00
+		std::uint32_t  health;      // 08
+		std::int8_t    flags;       // 0C
+		float          damage;      // 10
+	};
+	static_assert(sizeof(AMMO_DATA) == 0x18);
+}