Fixes to Context and InputStateValidator

- Added missing `Context::error()` method. :-(
- Added `InputStateValidator::new()` method.
- Updated `InputStateValidator::rule()` so that callback can accept `string` or `string[]` (e.g., for multi-selects) values.

src/Context.php

@@ -14,6 +14,7 @@
 use SlackPhp\BlockKit\Surfaces\{AppHome, Message};
 use SlackPhp\Framework\Contexts\{
     Blocks,
+    Error,
     HasData,
     Home,
     Modals,
@@ -370,6 +371,22 @@ public function say($message, ?string $channel = null, ?string $threadTs = null)
         }
     }
 
+    /**
+     * @param OptionList|array|null $options
+     */
+    public function options($options): void
+    {
+        if (!$this->payload->isType(PayloadType::blockSuggestion())) {
+            throw new Exception('Can only to use `options()` for block_suggestion requests');
+        }
+
+        if (is_array($options)) {
+            $options = OptionList::new()->options($options);
+        }
+
+        $this->ack($options);
+    }
+
     /**
      * @param AppHome|array|string|callable(): AppHome $appHome
      * @param string|null $userId If null, the value from the current payload will be used.
@@ -392,16 +409,31 @@ public function home($appHome, ?string $userId = null, bool $useHashIfAvailable
         }
     }
 
+    /**
+     * Perform an operation on the App Home.
+     *
+     * @return Home
+     */
     public function appHome(): Home
     {
         return new Home($this);
     }
 
+    /**
+     * Perform an operation with modals.
+     *
+     * @return Modals
+     */
     public function modals(): Modals
     {
         return new Modals($this);
     }
 
+    /**
+     * Ack with a response to the current modal.
+     *
+     * @return View
+     */
     public function view(): View
     {
         if (!$this->payload->isType(PayloadType::viewSubmission())) {
@@ -412,19 +444,14 @@ public function view(): View
     }
 
     /**
-     * @param OptionList|array|null $options
+     * Log and display an error to the user.
+     *
+     * @param Throwable $exception
+     * @return Error
      */
-    public function options($options): void
+    public function error(Throwable $exception): Error
     {
-        if (!$this->payload->isType(PayloadType::blockSuggestion())) {
-            throw new Exception('Can only to use `options()` for block_suggestion requests');
-        }
-
-        if (is_array($options)) {
-            $options = OptionList::new()->options($options);
-        }
-
-        $this->ack($options);
+        return new Error($this, $exception);
     }
 
     public function toArray(): array

src/Contexts/InputStateValidator.php

@@ -11,18 +11,23 @@ class InputStateValidator
 {
     private array $rules;
 
+    public static function new(): self
+    {
+        return new self();
+    }
+
     /**
      * Adds a validation rule for an input state field.
      *
      * @param string $key The block ID for the input in the state to validate.
      * @param bool $required Whether the input is required.
-     * @param null|callable(string): ?string $ruleFn Function that validates the input from the state and returns either
-     *                                               an error message string or null (for no error).
+     * @param null|callable(string|string[]): ?string $ruleFn Function to validate the input from the state and returns
+     *                                                        either an error message string or null (for no error).
      * @return $this
      */
     public function rule(string $key, bool $required, ?callable $ruleFn = null): self
     {
-        $this->rules[$key] = function (?string $value) use ($required, $ruleFn): ?string {
+        $this->rules[$key] = function ($value) use ($required, $ruleFn): ?string {
             if ($required && !isset($value)) {
                 return 'This value is required.';
             }