[Dynamic Zones] Implement dz switch id (#2343)

This adds the `dz_switch_id` field to doors and dynamic_zones. It will
allow for compasses to be automatically added to dz entrances and will
support moving clients to the dz on use without needing to script it.
These can be imported for switches/doors from live packet dumps.

Also removes compass packet encoders (same struct in all clients)

common/servertalk.h

@@ -169,6 +169,8 @@
 #define ServerOP_DzExpireWarning              0x045b
 #define ServerOP_DzCreated                    0x045c
 #define ServerOP_DzDeleted                    0x045d
+#define ServerOP_DzSetSwitchID                0x045e
+#define ServerOP_DzMovePC                     0x045f
 
 #define ServerOP_LSInfo				0x1000
 #define ServerOP_LSStatus			0x1001
@@ -1671,6 +1673,13 @@ struct ServerDzMemberStatuses_Struct {
 	ServerDzMemberStatusEntry_Struct entries[0];
 };
 
+struct ServerDzMovePC_Struct {
+	uint32 dz_id;
+	uint16 sender_zone_id;
+	uint16 sender_instance_id;
+	uint32 character_id;
+};
+
 struct ServerExpeditionLockout_Struct {
 	uint32 expedition_id;
 	uint64 expire_time;
@@ -1752,6 +1761,11 @@ struct ServerDzLocation_Struct {
 	float  heading;
 };
 
+struct ServerDzSwitchID_Struct {
+	uint32 dz_id;
+	int    dz_switch_id;
+};
+
 struct ServerDzMember_Struct {
 	uint32 dz_id;
 	uint16 dz_zone_id;