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>

composer.json

@@ -0,0 +1,19 @@
+{
+    "name": "ezscale/virtfusion-whmcs-module",
+    "description": "VirtFusion Direct Provisioning Module for WHMCS",
+    "type": "whmcs-module",
+    "license": "GPL-3.0-or-later",
+    "require-dev": {
+        "laravel/pint": "^1.0"
+    },
+    "scripts": {
+        "post-install-cmd": [
+            "cp hooks/pre-commit .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit"
+        ],
+        "post-update-cmd": [
+            "cp hooks/pre-commit .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit"
+        ],
+        "lint": "pint",
+        "lint-test": "pint --test"
+    }
+}