Enhance currency and gold rates API with custom throttling and improved responses

- Implemented a custom throttle middleware to limit requests to 2 per 30 seconds, enhancing API stability.
- Updated API responses to include Turkish messages for successful updates and error handling.
- Refactored the CurrencyController to integrate the new throttling logic and improve response clarity.
- Enhanced the Scribe documentation to reflect changes in API behavior and response formats.
- Updated views to improve branding and user experience, including dynamic content adjustments.

These changes collectively improve the API's performance, usability, and branding for the Truncgil Finance application.

app/Http/Middleware/CustomThrottleRequests.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Cache\RateLimiter;
+use Symfony\Component\HttpFoundation\Response;
+
+class CustomThrottleRequests
+{
+    protected $limiter;
+
+    public function __construct(RateLimiter $limiter)
+    {
+        $this->limiter = $limiter;
+    }
+
+    public function handle(Request $request, Closure $next, $maxAttempts = 60, $decayMinutes = 1): Response
+    {
+        $key = $request->ip();
+
+        if ($this->limiter->tooManyAttempts($key, $maxAttempts)) {
+            return response()->json([
+                'error' => 'Rate limit aşıldı',
+                'message' => 'Bu endpoint 30 dakikada bir kez çağrılabilir.',
+                'retry_after' => $this->limiter->availableIn($key)
+            ], 429);
+        }
+
+        $this->limiter->hit($key, $decayMinutes * 60);
+
+        return $next($request);
+    }
+}