CI workflow and CS fixer updates

[bmfmancini]

This pull request introduces four new custom agent definitions to the .github/agents directory, each designed to handle a specific area of expertise within the project. These agents are described in markdown files and include clear instructions, capabilities, and tool access. The main themes are the introduction of specialized agents for triage, code quality, PHP development, and MySQL/MariaDB database administration.

New Agent Definitions:

Agent Coordination and Routing:

• Added a Triage Agent (triage_agent.md.agent.md) that receives user requests, analyzes them, and delegates tasks to specialized agents using explicit routing rules and a deterministic matching strategy. The agent includes detailed instructions, sample routing rules, and a delegation payload template.

Code Quality and Development:

• Introduced a Code Quality Specialist agent (code-quality.agent.md) focused on code review, refactoring, testing, documentation, performance optimization, and security best practices for a LAMP stack with JavaScript frontend.
• Added a PHP Developer agent (php-developer.agent.md) specializing in PHP code development, debugging, optimization, and adherence to PSR-12 standards, with references to Cacti project functions and documentation.

Database Administration:

• Created a MySQL/MariaDB Database Administrator agent (mysql-mariadb.agent.md) to assist with database management, query optimization, troubleshooting, backup/recovery, security, and scripting, including references to built-in Cacti DB functions and relevant documentation.

[Copilot]

Pull request overview

This pull request performs comprehensive code quality improvements across the Monitor plugin codebase, primarily implementing PHP-CS-Fixer style changes. Additionally, it introduces CI/CD infrastructure and GitHub Copilot agent definitions. Despite the PR title "Csfixer" suggesting code style fixes, the description emphasizes agent definitions, which represents a minor discrepancy.

Changes:

• Modernized PHP syntax: converted array() to [], /* */ to // comments, else if to elseif
• Removed trailing whitespace and blank lines across all PHP files
• Improved code formatting: operator spacing, string concatenation, function call alignment
• Added GitHub Actions CI workflow for integration testing across PHP 8.1-8.4 and MariaDB 10.6
• Introduced GitHub Copilot instructions and specialized agent definitions (triage, code quality, PHP developer, MySQL/MariaDB DBA)
• Added vendor/ to .gitignore

Reviewed changes

Copilot reviewed 21 out of 22 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
setup.php	Modernized array syntax, comment style, control structures, and spacing throughout plugin setup code
poller_monitor.php	Applied consistent formatting to poller script including array syntax and comment style updates
monitor.php	Comprehensive formatting improvements to main UI controller following same patterns
themes/*/index.php	Removed trailing blank lines
sounds/index.php	Removed trailing blank line
locales/*/index.php	Removed trailing blank lines
index.php	Removed trailing blank line
.gitignore	Added vendor/ directory exclusion
.github/workflows/plugin-ci-workflow.yml	New CI workflow for integration testing
.github/copilot-instructions.md	New Copilot guidance document
.github/agents/*.agent.md	New agent definitions for triage, code quality, PHP development, and database administration

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.