✨ Add storage configuration, localization updates, and feed generation

- Added `publicDisk` configuration to `filesystems.php`.
- Expanded locale translations in `es.json` and `de.json`.
- Implemented RSS, Atom, and JSON feed views.
- Added `feed.php` configuration for feed generation.
- Introduced `ImageController` for image handling.
- Updated application routing to include `api.php`.

app/Http/Controllers/Api/CourseController.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Models\Course;
+use App\Models\Lecturer;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Http\Request;
+
+class CourseController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index(Request $request)
+    {
+        return Course::query()
+                       ->select('id', 'name', )
+                       ->orderBy('name')
+                       ->when($request->has('user_id'),
+                           fn(Builder $query) => $query->where('created_by', $request->user_id))
+                       ->when(
+                $request->search,
+                fn (Builder $query) => $query
+                    ->where('name', 'ilike', "%{$request->search}%")
+            )
+                       ->when(
+                           $request->exists('selected'),
+                           fn (Builder $query) => $query->whereIn('id',
+                               $request->input('selected', [])),
+                           fn (Builder $query) => $query->limit(10)
+                       )
+                       ->get()
+                       ->map(function (Course $course) {
+                           $course->image = $course->getFirstMediaUrl('logo',
+                               'thumb');
+
+                           return $course;
+                       });
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request)
+    {
+        //
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Course $course)
+    {
+        //
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, Course $course)
+    {
+        //
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     */
+    public function destroy(Course $course)
+    {
+        //
+    }
+}