Add pre-commit framework support

[echarrod]

Summary

This PR adds support for the pre-commit framework by adding:

1. .pre-commit-hooks.yaml - Defines the aikido-local-scanner hook for the pre-commit framework
2. aikido-local-scanner-wrapper - A wrapper script that finds and runs the scanner binary
3. Updated README - Documents both installation methods

Usage

After this change, users can add Aikido to their .pre-commit-config.yaml:

repos:
  - repo: https://github.com/AikidoSec/pre-commit
    rev: main  # or pin to a specific commit
    hooks:
      - id: aikido-local-scanner

The scanner binary still needs to be installed separately (the wrapper provides clear instructions if not found).

Benefits

• Standard integration with pre-commit framework
• Per-project configuration instead of global-only
• Version pinning support (can pin to specific commits)
• Works alongside other security scanning hooks
• Cleaner integration for teams already using pre-commit

Testing

1. Install the scanner binary using the existing installation script
2. Add the hook to a .pre-commit-config.yaml
3. Run pre-commit run aikido-local-scanner --all-files

Fixes #3

Summary by Aikido

🚀 New Features

• Added pre-commit hook configuration file for Aikido scanner