Multiple Output Formats

[eslksw]

First off: Thank you for this small util, I've used it for a couple of months now, and it's very helpful as part of a comprehensive literate programming workflow.

Now, I'd like to go one step further and export the tasks generated by TODO to 3rd-party tools or just output markdown to embed in a GitHub README or in something like Obsidian. Instead of post-processing the current output, I'd rather prefer having an output format flag and then directly output what I need. Could I contribute this as a PR or am I better off with forking the project?