feat: Added command line interface support (#1172)

System design has been discussed on discord

Should fix #948

---------

Co-authored-by: WerWolv <werwolv98@gmail.com>

main/include/messaging.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include<string>
+#include<vector>
+
+#include<hex/helpers/types.hpp>
+
+/**
+ * Cross-instance (cross-process) messaging system
+ * As of now, this system may not be stable for use beyond its current use:
+ * forwarding providers opened in new instances
+ */
+namespace hex::messaging {
+
+    /**
+     * @brief Setup everything to be able to send/receive messages
+     */
+    void setupMessaging();
+
+    /**
+     * @brief Internal method - setup platform-specific things to be able to send messages
+     * @return if this instance has been determined to be the main instance
+     */
+    bool setupNative();
+
+    /**
+     * @brief Internal method - send a message to another Imhex instance in a platform-specific way
+     */
+    void sendToOtherInstance(const std::string &eventName, const std::vector<u8> &args);
+    
+    /**
+     * @brief Internal method - called by platform-specific code when a event has been received
+     */
+    void messageReceived(const std::string &eventName, const std::vector<u8> &args);
+}