feat(cli): allow excluding patterns from formatter

[azjezz]

📌 What Does This PR Do?

This PR adds support for an excludes configuration option under the [format] section in mago.toml. With this new option, users can specify files, directories, or glob patterns that will be excluded from formatting operations. These files will not be modified during the formatting process, but they remain active for linting and other analysis tasks.

🔍 Context & Motivation

Several users have requested more granular control over formatting behavior. In many projects, there are files or directories (such as generated files ) that should not be reformatted by the tool. Prior to this change, Mago would format every file found during its scan, which sometimes led to unintended modifications.

By introducing an excludes option under [format], users now have the ability to tailor the formatting process. They can exclude specific paths or patterns from being formatted while still including them in other operations like linting. This enhancement improves both performance and user control.

🛠️ Summary of Changes

• Feature: Added support for the excludes key under the [format] section in mago.toml. This option accepts an array of file/directory patterns to exclude from formatting.
• Docs: Updated the configuration documentation to mention the new excludes option under [format].

📂 Affected Areas

• Linter
• Formatter
• CLI
• Composer Plugin
• Dependencies
• Documentation
• Other (please specify):

🔗 Related Issues or PRs

closes #28

📝 Notes for Reviewers

N/A