WIP Rasp LFI first approach

[iunanua]

What does this PR do?

WIP, at the moment:

• Define AppsecFsPlugin to identify root fs operations.
• Instrument express res.render to allow rasp LFI component to exclude fs operations caused by view rendering.

Motivation

Plugin Checklist

• [ ] Unit tests.
• [ ] TypeScript definitions.
• [ ] TypeScript tests.
• [ ] API documentation.
• [ ] CircleCI jobs/workflows.
• [ ] Plugin is exported.

Additional Notes