mlinter: a linter for Transformers modeling files

Mlinter is a standalone linter designed for the Transformers library to enforce structural rules in modeling and configuration files, which helps maintain consistency and prevent code errors. By utilizing static analysis of Python Abstract Syntax Trees (AST), it ensures that coding conventions are followed without runtime imports, thus catching potential issues early. Mlinter's rules are specific to Transformers modeling conventions and encoded with unique IDs for identification, providing explanations and fixes for each rule violation. This tool reduces the latency in identifying and correcting issues by providing immediate feedback to developers, integrating smoothly with coding agents, and enabling automated rule enforcement and extension. Mlinter's design is inspired by the Ruff linter, focusing on simplicity, transparency, and ease of use while supporting both human and AI agents in maintaining high code quality.