chore: implement pre-commit hooks

[toroviej0x0]

This will prevent accidental commits with secrets and enforce good practices before the bad ones reach the remote code.

[Copilot]

Pull request overview

This PR introduces pre-commit hooks to enforce code quality standards and prevent accidental commits of secrets or improper code. The configuration includes various validation hooks for file formats, whitespace management, and security checks using both the standard pre-commit-hooks and gitleaks for secret detection.

• Adds pre-commit configuration with standard hooks for file validation, merge conflict detection, and whitespace management
• Implements branch protection to prevent direct commits to main
• Integrates gitleaks for secret scanning

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