Add extra protections against shutdown and startup events firing incorrectly, version bump

gradle.properties

@@ -15,6 +15,6 @@ loom_version=1.11-SNAPSHOT
 fabric_version=0.129.0+1.21.8
 
 # Mod Properties
-mod_version = 0.2.3-alpha
+mod_version = 0.2.4-alpha
 maven_group = me.cortex
 archives_base_name = voxy

src/main/java/me/cortex/voxy/client/mixin/minecraft/MixinClientLoginNetworkHandler.java

@@ -1,5 +1,6 @@
 package me.cortex.voxy.client.mixin.minecraft;
 
+import me.cortex.voxy.client.VoxyClient;
 import me.cortex.voxy.client.VoxyClientInstance;
 import me.cortex.voxy.client.config.VoxyConfig;
 import me.cortex.voxy.commonImpl.VoxyCommon;
@@ -14,7 +15,7 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 public class MixinClientLoginNetworkHandler {
     @Inject(method = "onGameJoin", at = @At(value = "INVOKE", target = "Lnet/minecraft/network/packet/s2c/play/GameJoinS2CPacket;commonPlayerSpawnInfo()Lnet/minecraft/network/packet/s2c/play/CommonPlayerSpawnInfo;"))
     private void voxy$init(GameJoinS2CPacket packet, CallbackInfo ci) {
-        if (VoxyCommon.isAvailable()) {
+        if (VoxyCommon.isAvailable() && !VoxyClientInstance.isInGame) {
             VoxyClientInstance.isInGame = true;
             if (VoxyConfig.CONFIG.enabled) {
                 if (VoxyCommon.getInstance() != null) {

src/main/java/me/cortex/voxy/client/mixin/minecraft/MixinMinecraftClient.java

@@ -12,7 +12,7 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 public class MixinMinecraftClient {
     @Inject(method = "disconnect(Lnet/minecraft/client/gui/screen/Screen;Z)V", at = @At("TAIL"))
     private void voxy$injectWorldClose(CallbackInfo ci) {
-        if (VoxyCommon.isAvailable()) {
+        if (VoxyCommon.isAvailable() && VoxyClientInstance.isInGame) {
             VoxyCommon.shutdownInstance();
             VoxyClientInstance.isInGame = false;
         }