MrGranday/tasky-cli

AI Summary: This issue requests adding a `--json` flag to the `tasky list` command, enabling it to output data in JSON format. The implementation should update `src/main.rs` using the `clap` crate for argument parsing, and the output should be easily consumable by PowerShell's `ConvertFrom-Json`.

AI Summary: This issue proposes adding a new command, `tasky done <index>`, to mark a task as complete. The command should update the `done` property to `true` for the specified task in `tasks.json`. The implementation involves modifying `src/main.rs` and testing on Windows.