feat: add rack mode, colon commands, and client command parser

client/src/carla_host.h

@@ -2,6 +2,7 @@
 #define CARLA_HOST_H
 
 #include <stdbool.h>
+#include <CarlaHost.h>   /* CarlaHostHandle typedef */
 
 /* All functions return -1 on error, 0 on success (except carla_load which returns 0 on success and sets *out_id) */
 
@@ -14,4 +15,8 @@ int carla_connect(int id, const char *port_name, const char *looper_port);
 int carla_disconnect(const char *from, const char *to);
 void carla_set_bypass(int id, bool bypass);
 
+/* Get internal Carla host handle, may be NULL */
+int carla_disconnect_plugin(int id);
+CarlaHostHandle carla_get_handle(void);
+
 #endif