v0.3.0 of api_to_dart

Convert any API (Postman, OpenAPI, Apidog, or YAML) into type-safe Dart actions and response models with an interactive terminal UI. Changelog excerpt: ### New - versionsubcommand — prints the installed version. - upgradesubcommand — pulls the latest release from pub.dev. - Automatic update notice after any command when a newer version is available on pub.dev. ### Changed - Request logs are now Markdown (.md) instead of plain .log, with formatted sections for URL, headers, request body, status code, and response body. - Generated files are written under a dated subfolder (//actions/and .../logs/) so repeated r[...]