Bump com.puppycrawl.tools:checkstyle to 14.1.0 and fix warnings that were false-negatives before [ci skip]

Checkstyle fixed a bunch of false-negatives; linting errors in the source that should've been caught according to our settings. Rather than updating `checkstyle.xml` to work around these, this commit also properly fixes these checkstyle errors.

proxy/src/main/java/com/velocitypowered/proxy/VelocityServer.java

@@ -653,7 +653,7 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
   }
 
   /**
-   * Calls {@link #shutdown(boolean, Component)} with the default reason "Proxy shutting down."
+   * Calls {@link #shutdown(boolean, Component)} with the default reason "Proxy shutting down".
    *
    * @param explicitExit whether the user explicitly shut down the proxy
    */

proxy/src/main/java/com/velocitypowered/proxy/config/PingPassthroughMode.java

@@ -59,6 +59,6 @@ public record PingPassthroughMode(boolean version, boolean players,
 
   public boolean enabled() {
     return this.version || this.players || this.description || this.favicon
-      || this.modinfo;
+        || this.modinfo;
   }
 }

proxy/src/main/java/com/velocitypowered/proxy/connection/player/resourcepack/handler/ModernResourcePackHandler.java

@@ -37,7 +37,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 /**
- * Modern (Minecraft 1.20.3+) ResourcePackHandler
+ * Modern (Minecraft 1.20.3+) ResourcePackHandler.
  */
 public final class ModernResourcePackHandler extends ResourcePackHandler {
   private final ListMultimap<UUID, ResourcePackInfo> outstandingResourcePacks =

proxy/src/main/java/com/velocitypowered/proxy/connection/player/resourcepack/handler/ResourcePackHandler.java

@@ -118,6 +118,7 @@ public abstract sealed class ResourcePackHandler
 
   /**
    * Processes a client response to a sent resource-pack.
+   *
    * <p>Cases in which no action will be taken:</p>
    * <ul>
    *

proxy/src/main/java/com/velocitypowered/proxy/event/VelocityEventManager.java

@@ -545,6 +545,36 @@ public class VelocityEventManager implements EventManager {
     }
   }
 
+  private <E> void fire(final @Nullable CompletableFuture<E> future, final E event,
+      final int offset, final boolean currentlyAsync, final HandlerRegistration[] registrations) {
+    for (int i = offset; i < registrations.length; i++) {
+      final HandlerRegistration registration = registrations[i];
+      try {
+        final EventTask eventTask = registration.handler.executeAsync(event);
+        if (eventTask == null) {
+          continue;
+        }
+        final ContinuationTask<E> continuationTask = new ContinuationTask<>(eventTask,
+            registrations, future, event, i, currentlyAsync);
+        if (currentlyAsync || !eventTask.requiresAsync()) {
+          if (continuationTask.execute()) {
+            continue;
+          }
+        } else {
+          registration.plugin.getExecutorService().execute(continuationTask);
+        }
+        // fire will continue in another thread once the async task is
+        // executed and the continuation is resumed
+        return;
+      } catch (final Throwable t) {
+        logHandlerException(registration, t);
+      }
+    }
+    if (future != null) {
+      future.complete(event);
+    }
+  }
+
   private static final int TASK_STATE_DEFAULT = 0;
   private static final int TASK_STATE_EXECUTING = 1;
   private static final int TASK_STATE_CONTINUE_IMMEDIATELY = 2;
@@ -669,36 +699,6 @@ public class VelocityEventManager implements EventManager {
     }
   }
 
-  private <E> void fire(final @Nullable CompletableFuture<E> future, final E event,
-      final int offset, final boolean currentlyAsync, final HandlerRegistration[] registrations) {
-    for (int i = offset; i < registrations.length; i++) {
-      final HandlerRegistration registration = registrations[i];
-      try {
-        final EventTask eventTask = registration.handler.executeAsync(event);
-        if (eventTask == null) {
-          continue;
-        }
-        final ContinuationTask<E> continuationTask = new ContinuationTask<>(eventTask,
-            registrations, future, event, i, currentlyAsync);
-        if (currentlyAsync || !eventTask.requiresAsync()) {
-          if (continuationTask.execute()) {
-            continue;
-          }
-        } else {
-          registration.plugin.getExecutorService().execute(continuationTask);
-        }
-        // fire will continue in another thread once the async task is
-        // executed and the continuation is resumed
-        return;
-      } catch (final Throwable t) {
-        logHandlerException(registration, t);
-      }
-    }
-    if (future != null) {
-      future.complete(event);
-    }
-  }
-
   private static void logHandlerException(
       final HandlerRegistration registration, final Throwable t) {
     final PluginDescription pluginDescription = registration.plugin.getDescription();

proxy/src/main/java/com/velocitypowered/proxy/protocol/ProtocolUtils.java

@@ -644,7 +644,7 @@ public enum ProtocolUtils {
   private static final int FORGE_MAX_ARRAY_LENGTH = Integer.MAX_VALUE & 0x1FFF9A;
 
   /**
-   * Reads an byte array for legacy version 1.7 from the specified {@code buf}
+   * Reads an byte array for legacy version 1.7 from the specified {@code buf}.
    *
    * @param buf the buffer to read from
    * @return the read byte array
@@ -685,7 +685,7 @@ public enum ProtocolUtils {
   }
 
   /**
-   * Writes an byte array for legacy version 1.7 to the specified {@code buf}
+   * Writes an byte array for legacy version 1.7 to the specified {@code buf}.
    *
    * @param b             array
    * @param buf           buf
@@ -709,7 +709,7 @@ public enum ProtocolUtils {
   }
 
   /**
-   * Writes an {@link ByteBuf} for legacy version 1.7 to the specified {@code buf}
+   * Writes an {@link ByteBuf} for legacy version 1.7 to the specified {@code buf}.
    *
    * @param b             array
    * @param buf           buf