Update README.md to add more documentation.

README.md

@@ -30,4 +30,78 @@ class Cast extends FormRequest
     }
 }
 ```
-`$request->castedInput('toBoolean')` will return a boolean value.
+`$request->castedInput('toBoolean')` will return a boolean value.
+
+## Available Casts
+- int
+- integer
+- float
+- double
+- decimal
+- string
+- boolean
+- object
+- array
+- json
+- collection
+- date
+- datetime
+- immutable_date
+- immutable_datetime
+- timestamp
+
+
+## Custom Casts
+Custom casts allow for more complex casting logic. Enums and custom classes can be used. Custom cast classes must implement `NickEscobedo\Cambia\CastsRequestAttributes`.
+
+### Enum
+```php
+enum Status: string
+{
+    case Pending = 'pending';
+}
+```
+```php
+public function casts(): array
+{
+    return [
+        'status' => Status::class,
+    ];
+}
+```
+
+### Custom Cast Class
+The class must implement `NickEscobedo\Cambia\CastsRequestAttributes`.
+```php
+use Illuminate\Http\Request;
+use NickEscobedo\Cambia\CastsRequestAttributes;
+
+class JsonCast implements CastsRequestAttributes
+{
+
+    public function get(Request $request, string $key, mixed $value, array $attributes)
+    {
+        return json_decode($value, true);
+    }
+}
+```
+```php
+class Cast extends FormRequest
+{
+    use CastRequestAttributes;
+
+    public function rules(): array
+    {
+        return [
+            'toBoolean' => 'string', // Fields not present in validation will not cast
+        ];
+    }
+
+    public function casts(): array
+    {
+        return [
+            'toBoolean' => JsonCast::class,
+        ];
+    }
+}
+```