Optimize requirements and some utils

src/main/java/to/itsme/itsmyconfig/requirement/RequirementManager.java

@@ -30,7 +30,12 @@ public final class RequirementManager {
      * @return the Requirement object that matches the given type, or null if no match is found
      */
     public Requirement<?> getRequirementByType(final String type) {
-        return this.requirements.stream().filter(requirement -> requirement.matchIdentifier(type)).findAny().orElse(null);
+        for (final Requirement<?> requirement : this.requirements) {
+            if (requirement.matchIdentifier(type)) {
+                return requirement;
+            }
+        }
+        return null;
     }
 
     /**

src/main/java/to/itsme/itsmyconfig/util/Strings.java

@@ -217,12 +217,12 @@ public static String integerToRoman(int num) {
     }
 
     /**
-     * Converts a list of objects to a string, where each object is represented on a new line.
+     * Converts a list of strings to a string, where each string is represented on a new line.
      *
-     * @param list The list of objects to be converted to a string.
+     * @param list The list of strings to be converted to a string.
      * @return The string representation of the list.
      */
-    public static String toString(final @NotNull List<?> list) {
+    public static String toString(final @NotNull List<String> list) {
         return String.join(System.lineSeparator(), list.stream().map(Object::toString).toArray(String[]::new));
     }