Ln 741 Linter Configurator

This sets up linting, formatting, and type checking for TypeScript, Python, or .NET projects with opinionated configs that actually work together. It detects what you're building, checks for existing configs, generates templates for ESLint 9 flat config, Ruff, mypy, or Roslyn analyzers, and creates a unified lint.sh script that runs everything. The Python stack is notably complete with seven checks including import-linter, deptry, and vulture, not just the basics. It installs latest versions without pinning, verifies the setup runs clean, and includes a fix phase for working through violations. Use this when bootstrapping a project or when you're tired of copy-pasting half-working linter configs between repos.