Refactor CurrencyController to improve method documentation and simplify rate retrieval

- Updated PHPDoc comments for methods to enhance clarity, specifically for `getAllRates`, `getCurrentRates`, `getGoldRates`, `getCurrencyRateByName`, and `getGoldRateByName`.
- Removed commented-out job dispatching code to streamline the `getAllRates` method.
- Adjusted method descriptions to be more concise and focused on their functionality.

These changes enhance the maintainability and readability of the CurrencyController, facilitating better management of financial data.

app/Http/Controllers/CurrencyController.php

@@ -25,18 +25,13 @@ class CurrencyController extends Controller
     }
 
     /**
-     * Retrieves all merged currency rates from a JSON file.
+     * Retrieves all gold and currency rates 
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function getAllRates()
     {
-        // Job'ı çalıştır
-        /*
-        FetchCurrencyRates::dispatchSync();
-        FetchGoldRates::dispatchSync();
-        MergeCurrencyAndGoldRates::dispatchSync();
-        */
+        
         // JSON dosyasından oku
         $jsonFile = 'merged/rates.json';    
         if (Storage::exists($jsonFile)) {
@@ -49,7 +44,7 @@ class CurrencyController extends Controller
     }
 
     /**
-     * Retrieves the current currency rates from a JSON file.
+     * Retrieves the current currency rates 
      *
      * @return \Illuminate\Http\JsonResponse
      */
@@ -67,7 +62,7 @@ class CurrencyController extends Controller
     }
 
     /**
-     * Retrieves the current gold rates from a JSON file.
+     * Retrieves the current gold rates 
      *
      * @return \Illuminate\Http\JsonResponse
      */
@@ -85,7 +80,7 @@ class CurrencyController extends Controller
     }
 
     /**
-     * Retrieves the currency rate by its name from a JSON file.
+     * Retrieves the currency rate by its name 
      *
      * @param string $currencyName
      * @return \Illuminate\Http\JsonResponse
@@ -106,7 +101,7 @@ class CurrencyController extends Controller
     }
 
     /**
-     * Retrieves the gold rate by its name from a JSON file.
+     * Retrieves the gold rate by its name 
      *
      * @param string $goldName
      * @return \Illuminate\Http\JsonResponse