feat: auto-create custom fields, add try/catch coverage, PHPDoc, and Pint formatting

- Auto-create 'Initial Operating System' and 'Initial SSH Key' custom fields
  via Database::ensureCustomFields() on module load, eliminating the manual
  modify.sql step
- Delete modify.sql (no longer needed)
- Add try/catch blocks around every DB operation and API call across all PHP
  files per CLAUDE.md error handling rules
- Add comprehensive PHPDoc to all classes, methods, and properties
- Set up Laravel Pint (laravel/pint) with Laravel-style preset for consistent
  code formatting across the codebase
- Add git pre-commit hook (hooks/pre-commit) that runs Pint on staged PHP
  files, auto-installed via Composer post-install/post-update scripts
- Simplify README installation to a single copy-paste command

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -91,6 +91,8 @@ The `publish-release.yml` workflow creates a GitHub/Gitea release with auto-gene
 6. Updates WHMCS hosting record (IP, username, password, domain)
 7. Calls `ConfigureService::initServerBuild()` with selected OS + SSH key
 
+Custom fields (`Initial Operating System`, `Initial SSH Key`) are auto-created by `Database::ensureCustomFields()` on module load for all products using this module. No manual SQL setup required.
+
 ### Configurable Option Mapping
 
 Custom option names can be mapped in `config/ConfigOptionMapping.php` (copy from `-example.php`). Default mapping keys: `packageId`, `hypervisorId`, `ipv4`, `storage`, `memory`, `traffic`, `cpuCores`, `networkSpeedInbound`, `networkSpeedOutbound`, `networkProfile`, `storageProfile`.