Add stricter linting and type checking

[safurrier]

Summary

Makes ruff and mypy catch more issues before they reach production.

Changes

Linting Rules

• Added security checks (bandit), naming rules, and modern Python patterns
• Catches inline imports and enforces proper import organization
• Updated example code to use built-in types instead of typing module

Type Checking

• Enabled mypy strict mode with all warnings
• Catches untyped functions and missing return types

Project Setup

• Init script now updates ruff config when creating new projects
• Automatically sets the correct module name for import sorting

The pre-commit hooks now catch these issues automatically, so the main branch stays cleaner.