refactor!: Invert middleware application order

The previous ordering was pretty confusing and even led to a mess-up in the serde validation.

tweed5/attributes-extension/src/main/java/de/siphalor/tweed5/attributesextension/impl/serde/filter/AttributesReadWriteFilterExtensionImpl.java

@@ -31,11 +31,11 @@ import java.util.*;
 
 public class AttributesReadWriteFilterExtensionImpl
 		implements AttributesReadWriteFilterExtension, AttributesRelatedExtension, ReadWriteRelatedExtension {
-	private static final Set<String> MIDDLEWARES_MUST_COME_BEFORE = Collections.emptySet();
-	private static final Set<String> MIDDLEWARES_MUST_COME_AFTER = new HashSet<>(Arrays.asList(
-			Middleware.DEFAULT_END,
+	private static final Set<String> MIDDLEWARES_MUST_COME_BEFORE = new HashSet<>(Arrays.asList(
+			Middleware.DEFAULT_START,
 			"validation"
 	));
+	private static final Set<String> MIDDLEWARES_MUST_COME_AFTER = Collections.emptySet();
 	private static final UniqueSymbol TWEED_DATA_NOTHING_VALUE = new UniqueSymbol("nothing (skip value)");
 
 	private final ConfigContainer<?> configContainer;

tweed5/comment-loader-extension/src/main/java/de/siphalor/tweed5/commentloaderextension/impl/CommentLoaderExtensionImpl.java

@@ -53,12 +53,12 @@ public class CommentLoaderExtensionImpl implements CommentLoaderExtension, Comme
 
 			@Override
 			public Set<String> mustComeBefore() {
-				return Collections.singleton(Middleware.DEFAULT_START);
+				return Collections.emptySet();
 			}
 
 			@Override
 			public Set<String> mustComeAfter() {
-				return Collections.emptySet();
+				return Collections.singleton(Middleware.DEFAULT_END);
 			}
 
 			@Override

tweed5/core/src/main/java/de/siphalor/tweed5/core/api/middleware/DefaultMiddlewareContainer.java

@@ -112,7 +112,8 @@ public class DefaultMiddlewareContainer<M> implements MiddlewareContainer<M> {
 			throw new IllegalStateException("Middleware container has not been sealed");
 		}
 		M combined = inner;
-		for (Middleware<M> middleware : middlewares) {
+		for (int i = middlewares.size() - 1; i >= 0; i--) {
+			Middleware<M> middleware = middlewares.get(i);
 			combined = middleware.process(combined);
 		}
 		return combined;

tweed5/default-extensions/src/main/java/de/siphalor/tweed5/defaultextensions/validation/api/validators/SimpleValidatorMiddleware.java

@@ -19,7 +19,7 @@ public class SimpleValidatorMiddleware implements Middleware<ConfigEntryValidato
 		return new ConfigEntryValidator() {
 			@Override
 			public <T extends @Nullable Object> ValidationResult<T> validate(ConfigEntry<T> configEntry, T value) {
-				return inner.validate(configEntry, value).andThen(v -> validator.validate(configEntry, v));
+				return validator.validate(configEntry, value).andThen(v -> inner.validate(configEntry, v));
 			}
 
 			@Override
@@ -28,7 +28,11 @@ public class SimpleValidatorMiddleware implements Middleware<ConfigEntryValidato
 				if (description.isEmpty()) {
 					return inner.description(configEntry);
 				}
-				return inner.description(configEntry) + "\n" + description;
+				String innerDescription = inner.description(configEntry);
+				if (innerDescription.isEmpty()) {
+					return description;
+				}
+				return description + "\n" + innerDescription;
 			}
 		};
 	}

tweed5/default-extensions/src/main/java/de/siphalor/tweed5/defaultextensions/validationfallback/impl/ValidationFallbackExtensionImpl.java

@@ -74,12 +74,12 @@ public class ValidationFallbackExtensionImpl implements ValidationFallbackExtens
 
 		@Override
 		public Set<String> mustComeBefore() {
-			return Collections.emptySet();
+			return Collections.singleton(Middleware.DEFAULT_START);
 		}
 
 		@Override
 		public Set<String> mustComeAfter() {
-			return Collections.singleton("$default.end");
+			return Collections.emptySet();
 		}
 
 		@Override