ci: Broaden plugin-check.yml trigger to run for all files

[josephfusco]

This pull request updates the GitHub Actions workflow configuration in .github/workflows/plugin-check.yml to broaden the file matching patterns and adjust the settings for the plugin check job. The main goal is to ensure the workflow triggers on any changes within the plugins directory and to fine-tune the behavior of the plugin detection job.

Workflow trigger updates:

• Broadened the workflow trigger patterns from only PHP files to all files within the plugins directory by changing the paths filter from 'plugins/**/*.php' to 'plugins/**' for both push and pull_request events.

Plugin check job configuration:

• Added ignore-warnings: true and include-experimental: false to the plugin detection job, which will suppress warnings and exclude experimental plugins from the check.

[changeset-bot]

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Latest commit: 16e5b23

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