Lua Scripting (#1334)

Closes #83
Fixes #1309
Fixes #1287
Fixes #1129 (actually fixed now)

src/lua/bindings/event.hpp

@@ -0,0 +1,23 @@
+#pragma once
+#include "fiber_pool.hpp"
+#include "lua/lua_module.hpp"
+#include "script_mgr.hpp"
+
+namespace lua::event
+{
+	static void register_handler(const std::string& name, sol::function func, sol::this_state state)
+	{
+		auto module = sol::state_view(state)["!this"].get<big::lua_module*>();
+
+		auto hash = rage::joaat(name);
+		module->m_event_callbacks.emplace(hash, std::vector<sol::function>());
+		module->m_event_callbacks[hash].push_back(func);
+	}
+
+	static void bind(sol::state& state)
+	{
+		auto ns                = state["event"].get_or_create<sol::table>();
+		ns["register_handler"] = register_handler;
+		// TODO: triggering events through script?
+	}
+}