feat: migration now supports configs aswell

Author: objz

core/src/main/java/dev/objz/commandbridge/scripting/migration/MigrationStep.java

@@ -1,18 +1,25 @@
 package dev.objz.commandbridge.scripting.migration;
 
 import java.util.List;
+import java.util.Map;
 
 /**
  * Represents a single version-to-version migration step loaded from a
- * resource file (e.g. {@code migrations/2-3.yml})
+ * resource file (e.g. {@code migrations/2-3.yml}).
+ * <p>
+ * Rules are grouped by section {@code "scripts"}, {@code "configs"}.
  *
- * @param from  the source version
- * @param to    the target version
- * @param rules the list of rules to apply
+ * @param from     the source version
+ * @param to       the target version
+ * @param sections map of section name to its list of migration rules
  */
-public record MigrationStep(int from, int to, List<MigrationRule> rules) {
+public record MigrationStep(int from, int to, Map<String, List<MigrationRule>> sections) {
 
     public MigrationStep {
-        rules = List.copyOf(rules);
+        sections = Map.copyOf(sections);
+    }
+
+    public List<MigrationRule> rules(String section) {
+        return sections.getOrDefault(section, List.of());
     }
 }