nyx: Allow disabling of Joycon

Setting `jcdisable=1` in nyx.ini disables the usage of Joycon completely.

This also disables the BT pairing data dumping tool.

nyx/nyx_gui/config.h

@@ -48,6 +48,7 @@ typedef struct _nyx_config
 	u32 home_screen;
 	u32 verification;
 	u32 ums_emmc_rw;
+	u32 jc_disable;
 } nyx_config;
 
 void set_default_configuration();