Add Backend config() method

Added config method to allow the user to pass any flatpickr config to the component from the form field.

src/Flatpickr.php

@@ -20,6 +20,8 @@ class Flatpickr extends Field
     protected bool $multiplePicker = false;
 
     protected bool $altInput = true;
+
+    protected array $config = [];
 
     protected ?string $altFormat = 'F j, Y';
 
@@ -47,6 +49,24 @@ public function isWeekSelect(): bool
     {
         return $this->weekSelect;
     }
+
+    /**
+     * @param array $config
+     * @return Flatpickr
+     */
+    public function config(array|\Closure $config): Flatpickr
+    {
+        $this->config = $config;
+        return $this;
+    }
+
+    /**
+     * @return array
+     */
+    public function getConfig(): array
+    {
+        return $this->config;
+    }
 
     /**
      * @param  bool  $rangePicker