Add StandaloneLinePlainConstructorParamFixer to spaces set

[TomasVotruba]

Constructors with plain (non-promoted) params were not covered by any set rule. StandaloneLinePromotedPropertyFixer only fires when a promoted property is present, and StandaloneLineConstructorParamFixer is registered as conflicting with it, so it cannot be added to the same set.

This adds StandaloneLinePlainConstructorParamFixer, which handles exactly the gap: constructors that have params and no promoted properties. The two rules never touch the same constructor, so both live in the spaces set.

 final class LeadController
 {
-    public function __construct(CorePermissions $security, Translator $translator, RouterInterface $router, FormFactoryInterface $formFactory)
+    public function __construct(
+        CorePermissions $security,
+        Translator $translator,
+        RouterInterface $router,
+        FormFactoryInterface $formFactory
+    )
     {
     }
 }

One param per line keeps a new or removed dependency down to a single-line diff.

Skipped:

• constructors with promoted properties (handled by StandaloneLinePromotedPropertyFixer)
• empty param list
• any method other than __construct

Registered in SpacesLevel::RULES next to its sibling standalone-line rules, so it ships with the spaces set and withSpacesLevel().

Applying the rule to this repo reformatted one constructor in TokenNotFoundException.