fix: bundle adventure-nbt to resolve NoClassDefFoundError on Folia/Paper

PacketEvents declares adventure-nbt as a compile dependency but does not
bundle it inside its own jar. The server does not expose net.kyori.adventure.nbt
to plugin classloaders, causing NoClassDefFoundError: net/kyori/adventure/nbt/BinaryTag
at startup inside SynchronizedRegistriesHandler.

Fixes:
- Remove adventure-nbt exclusion filter from maven-shade-plugin so all 75
  net.kyori.adventure.nbt classes are bundled in the shaded jar
- Upgrade PacketEvents 2.12.0 -> 2.12.2 (adventure-nbt 4.25.0 -> 4.26.1,
  improved compatibility with modern Paper/Folia builds)
- Bump plugin version 3.1.0 -> 3.1.1

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>me.legendcraft</groupId>
     <artifactId>AntiSeedCracker</artifactId>
-    <version>3.1.0</version>
+    <version>3.1.1</version>
     <packaging>jar</packaging>
 
     <name>AntiSeedCracker</name>
@@ -43,7 +43,7 @@
         <dependency>
             <groupId>com.github.retrooper</groupId>
             <artifactId>packetevents-spigot</artifactId>
-            <version>2.12.0</version>
+            <version>2.12.2</version>
             <scope>compile</scope>
         </dependency>
 
@@ -120,10 +120,6 @@
                             <artifact>net.kyori:adventure-key</artifact>
                             <excludes><exclude>**</exclude></excludes>
                         </filter>
-                        <filter>
-                            <artifact>net.kyori:adventure-nbt</artifact>
-                            <excludes><exclude>**</exclude></excludes>
-                        </filter>
                         <filter>
                             <artifact>net.kyori:examination-api</artifact>
                             <excludes><exclude>**</exclude></excludes>

src/main/resources/plugin.yml

@@ -1,5 +1,5 @@
 name: AntiSeedCracker
-version: '3.1.0'
+version: '3.1.1'
 main: me.legendcraft.antiseedcracker.AntiSeedCrackerPlugin
 api-version: '26.1'
 folia-supported: true