config: Add forRemoval option

libraries/config/src/main/java/com/fancyinnovations/config/Config.java

@@ -71,6 +71,15 @@ public class Config {
             String path = entry.getKey();
             ConfigField<?> field = entry.getValue();
 
+            if (field.forRemoval()) {
+                if (yaml.isSet(path)) {
+                    logger.debug("Removing path '" + path + "' from config");
+                    yaml.set(path, null);
+                    dirty = true;
+                }
+                continue;
+            }
+
             if (yaml.isSet(path)) {
                 Object value = yaml.get(path);
                 if (field.type().isInstance(value)) {

libraries/config/src/main/java/com/fancyinnovations/config/ConfigField.java

@@ -3,6 +3,7 @@ package com.fancyinnovations.config;
 public record ConfigField<T>(
         String path,
         String description,
+        boolean forRemoval,
         T defaultValue,
         Class<T> type
 ) {