Improve the documentation on what is needed.

Author: bordoni

README.md

@@ -14,6 +14,39 @@ StellarWP coding standards uses a combination of:
 > composer global require "squizlabs/php_codesniffer=3.4.2"
 > ```
 
+## Complete Installation Script
+
+For a full installation of all required components, you can use the following script. This will install all necessary packages globally and configure PHPCS to use them:
+
+```bash
+#!/bin/bash
+
+# Install PHP_CodeSniffer
+composer global require "squizlabs/php_codesniffer=^3.8.0"
+
+# Install required coding standards and dependencies
+composer global require "wp-coding-standards/wpcs:^3.0.0"
+composer global require "automattic/vipwpcs:^3.0"
+composer global require "phpcsstandards/phpcsextra:*"
+composer global require "phpcsstandards/phpcsutils:*"
+composer global require "stellarwp/coding-standards:*"
+composer global require "sirbrillig/phpcs-variable-analysis:*"
+composer global require "slevomat/coding-standard:^8.14.0"
+
+# Update PHPCS installed paths to include all standards
+phpcs --config-set installed_paths "$(phpcs --config-show | grep installed_paths | awk '{ print $2 }'),${HOME}/.config/composer/vendor/phpcsstandards/phpcsextra,${HOME}/.config/composer/vendor/phpcsstandards/phpcsutils,${HOME}/.config/composer/vendor/wp-coding-standards/wpcs,${HOME}/.composer/vendor/automattic/vipwpcs,${HOME}/.composer/vendor/stellarwp/coding-standards,${HOME}/.composer/vendor/sirbrillig/phpcs-variable-analysis,${HOME}/.composer/vendor/slevomat/coding-standard"
+
+# Verify installation
+echo "Installed PHPCS version:"
+phpcs --version
+echo ""
+echo "Installed coding standards:"
+phpcs -i
+```
+
+> [!NOTE]
+> The script assumes your global Composer binaries are in your PATH. Adjust the paths in the script if your Composer global installation directory is different.
+
 ## Setup on PHPStorm
 
 You can follow [this guide](https://confluence.jetbrains.com/display/PhpStorm/PHP+Code+Sniffer+in+PhpStorm#PHPCodeSnifferinPhpStorm-4.1.Obtainingcustomcodestyles) the only step you can replace is the one on **Installing via Composer** by the one above to install the 3.4.2 version instead.