Sort mixin methods alphabetically and fix metricMass naming

Sort all method declarations in Builder and Chain mixin interfaces
alphabetically for consistency. Rename `metricMass` to `mass` to
correctly match `MassFormatter` via the `ucfirst($name) . 'Formatter'`
convention used by FormatterBuilder's magic methods.

Assisted-by: Claude Code (claude-opus-4-6)

Author: henriquemoody

src/Mixin/Builder.php

@@ -20,20 +20,20 @@ public static function area(string $unit): Chain;
 
     public static function creditCard(): Chain;
 
-    public static function secureCreditCard(string $maskChar = '*'): Chain;
+    public static function date(string $format = 'Y-m-d H:i:s'): Chain;
 
     public static function imperialArea(string $unit): Chain;
 
     public static function imperialLength(string $unit): Chain;
 
     public static function imperialMass(string $unit): Chain;
 
-    public static function date(string $format = 'Y-m-d H:i:s'): Chain;
-
     public static function lowercase(): Chain;
 
     public static function mask(string $range, string $replacement = '*'): Chain;
 
+    public static function mass(string $unit): Chain;
+
     public static function metric(string $unit): Chain;
 
     public static function number(
@@ -42,13 +42,13 @@ public static function number(
         string $thousandsSeparator = ',',
     ): Chain;
 
-    public static function metricMass(string $unit): Chain;
-
     public static function pattern(string $pattern): Chain;
 
     /** @param array<string, mixed> $parameters */
     public static function placeholder(array $parameters): Chain;
 
+    public static function secureCreditCard(string $maskChar = '*'): Chain;
+
     public static function time(string $unit): Chain;
 
     public static function uppercase(): Chain;

src/Mixin/Chain.php

@@ -19,20 +19,20 @@ public function area(string $unit): Chain;
 
     public function creditCard(): Chain;
 
-    public function secureCreditCard(string $maskChar = '*'): Chain;
+    public function date(string $format = 'Y-m-d H:i:s'): Chain;
 
     public function imperialArea(string $unit): Chain;
 
     public function imperialLength(string $unit): Chain;
 
     public function imperialMass(string $unit): Chain;
 
-    public function date(string $format = 'Y-m-d H:i:s'): Chain;
-
     public function lowercase(): Chain;
 
     public function mask(string $range, string $replacement = '*'): Chain;
 
+    public function mass(string $unit): Chain;
+
     public function metric(string $unit): Chain;
 
     public function number(
@@ -41,13 +41,13 @@ public function number(
         string $thousandsSeparator = ',',
     ): Chain;
 
-    public function metricMass(string $unit): Chain;
-
     public function pattern(string $pattern): Chain;
 
     /** @param array<string, mixed> $parameters */
     public function placeholder(array $parameters): Chain;
 
+    public function secureCreditCard(string $maskChar = '*'): Chain;
+
     public function time(string $unit): Chain;
 
     public function uppercase(): Chain;