✨ Add errorprone and fix warnings/errors

The compiler will also treat all warnings as errors from now on.

cloud-services/src/main/java/cloud/commandframework/services/AnnotatedMethodService.java

@@ -52,6 +52,7 @@ class AnnotatedMethodService<Context, Result> implements Service<Context, Result
                 executionOrder = order.value();
             }
         } catch (final Exception ignored) {
+            // This is fine
         }
         this.instance = instance;
         this.executionOrder = executionOrder;

cloud-services/src/main/java/cloud/commandframework/services/PipelineException.java

@@ -32,6 +32,8 @@ import org.checkerframework.checker.nullness.qual.NonNull;
  */
 public final class PipelineException extends RuntimeException {
 
+    private static final long serialVersionUID = -7092487758537841656L;
+
     /**
      * Construct a new pipeline exception
      *

cloud-services/src/main/java/cloud/commandframework/services/ServicePipeline.java

@@ -108,7 +108,7 @@ public final class ServicePipeline {
      * @return Service pipeline instance
      * @throws Exception Any exceptions thrown during the registration process
      */
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings({"unchecked", "rawtypes"})
     public <T> @NonNull ServicePipeline registerMethods(
             final @NonNull T instance
     ) throws Exception {

cloud-services/src/main/java/cloud/commandframework/services/types/ConsumerService.java

@@ -50,6 +50,7 @@ public interface ConsumerService<Context>
     }
 
     @Override
+    @SuppressWarnings("FunctionalInterfaceMethodChanged")
     default @NonNull State handle(final @NonNull Context context) {
         try {
             this.accept(context);
@@ -71,6 +72,8 @@ public interface ConsumerService<Context>
 
     class PipeBurst extends RuntimeException {
 
+        private static final long serialVersionUID = -1143137258194595985L;
+
         private PipeBurst() {
         }
 

cloud-services/src/main/java/cloud/commandframework/services/types/Service.java

@@ -55,6 +55,7 @@ public interface Service<Context, Result> extends Function<@NonNull Context, @Nu
     @Nullable Result handle(@NonNull Context context) throws Exception;
 
     @Override
+    @SuppressWarnings("FunctionalInterfaceMethodChanged")
     default @Nullable Result apply(@NonNull Context context) {
         try {
             return this.handle(context);