refactor: reorganize app/Services and app/Support by domain

The app/Services/ directory had grown into 22 flat files at the root plus 7 uneven subdirectories — finding anything required scrolling through an alphabetical mix of small CRUD services, infrastructure drivers, and install-time utilities. This commit groups services by domain, folds Backup into a new Storage namespace, and moves framework-infrastructure and install-time helpers out of Services and into Support where they belong.

New Services layout: Documents/ (Invoice, Estimate, RecurringInvoice, Payment, Expense, Transaction, DocumentItem, SerialNumber, Currency — matches the 'Documents' navigation group); Company/ (Company, Member, Invitation); Mail/ (MailConfiguration, CompanyMailConfig); Storage/ (FileDisk, plus Backup folded in). ExchangeRateProviderService moves next to its drivers in ExchangeRate/; FontService moves into Pdf/ where it belongs. CustomerService, ItemService, CustomFieldService stay at the Services root as standalone single-file domains.

Moves to Support/: Hashids/ (library wrapper — not business logic); Setup/ (one-shot install-time utilities — stateless helpers); Pdf/ (ImageUtils, PdfTemplateUtils, plus the existing PdfHtmlSanitizer consolidated into the same subdir). These are all framework infrastructure and stateless utilities — the 'service' label never really fit them.

Namespace declarations in 29 moved files updated to match new paths. 62 consumer files (controllers, other services, tests, database factories, seeders, routes, bootstrap/providers.php) have their use statements rewritten via a literal-string replacement script — no regex meant no risk of half-matching. Three Documents services needed an explicit 'use App\Services\Mail\CompanyMailConfigService' added because the same-namespace short reference they relied on no longer resolves after the split.

Verified: composer dump-autoload, 350 tests pass (850 assertions), vendor/bin/pint clean, npm run build succeeds.

app/Support/Setup/InstallUtils.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace App\Support\Setup;
+
+use App\Models\Setting;
+use Illuminate\Database\QueryException;
+use Illuminate\Support\Facades\File;
+
+class InstallUtils
+{
+    /**
+     * Check if database is created
+     *
+     * @return bool
+     */
+    public static function isDbCreated()
+    {
+        return self::tableExists('users');
+    }
+
+    /**
+     * Check if database is created
+     *
+     * @return bool|int|string
+     */
+    public static function tableExists($table)
+    {
+        static $cache = [];
+
+        if (isset($cache[$table])) {
+            return $cache[$table];
+        }
+
+        try {
+            $flag = \Schema::hasTable($table);
+        } catch (QueryException|\Exception $e) {
+            $flag = false;
+        }
+
+        $cache[$table] = $flag;
+
+        return $cache[$table];
+    }
+
+    /**
+     * Set the app version
+     *
+     * @return void
+     */
+    public static function setCurrentVersion()
+    {
+        $version = preg_replace('~[\r\n]+~', '', File::get(base_path('version.md')));
+        if (! $version) {
+            return;
+        }
+        Setting::setSetting('version', $version);
+    }
+}