Rename controller namespaces: drop V1 prefix, clarify roles

V1/Admin     -> Company       (company-scoped controllers)
V1/SuperAdmin -> Admin        (platform-wide admin controllers)
V1/Customer  -> CustomerPortal (customer-facing portal)
V1/Installation -> Setup      (installation wizard)
V1/PDF       -> Pdf           (consistent casing)
V1/Modules   -> Modules       (drop V1 prefix)
V1/Webhook   -> Webhook       (drop V1 prefix)

The V1 prefix served no purpose - API versioning is in the route prefix
(/api/v1/), not the controller namespace. "Admin" was misleading for
company-scoped controllers. "SuperAdmin" is now simply "Admin" for
platform administration.

app/Http/Controllers/Company/Auth/LoginController.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Http\Controllers\Company\Auth;
+
+use App\Http\Controllers\Controller;
+use App\Providers\AppServiceProvider;
+use Illuminate\Foundation\Auth\AuthenticatesUsers;
+
+class LoginController extends Controller
+{
+    /*
+    |--------------------------------------------------------------------------
+    | Login Controller
+    |--------------------------------------------------------------------------
+    |
+    | This controller handles authenticating users for the application and
+    | redirecting them to your home screen. The controller uses a trait
+    | to conveniently provide its functionality to your applications.
+    |
+    */
+
+    use AuthenticatesUsers;
+
+    /**
+     * Where to redirect users after login.
+     *
+     * @var string
+     */
+    protected $redirectTo = AppServiceProvider::HOME;
+
+    /**
+     * Create a new controller instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        $this->middleware('guest')->except('logout');
+    }
+}