rikkarth/ez-vdl

AI Summary: Implement an `ArgParser` to manage command-line arguments, supporting a boolean `quiet` mode (`-q`/`--quiet`) and a `non-interactive` mode. The non-interactive mode will initially be triggered by a string `url` option (`-u`/`--url`), with interactive mode as the default. The parser should perform basic validations (e.g., empty, null, string injection) and be defined as a function in `arg_manager.py`.

AI Summary: This issue proposes adding a new command-line option (`-o` or `--output`) to the `ArgParser` to allow users to specify the final output path for downloaded files. The option should accept both relative and absolute paths and depends on another issue.