Feature request: Double click executable to receive

Coming from croc, sendme is a lot less friendlier for people who aren't familiar with command line tools. With croc, you can double click the executable (at least on Windows), and it'll open a console window with a prompt of Enter receive code:. (This also shows up when croc is ran with no arguments, so I presume that's how it detects it being double clicked.)

croc also detects when an absolute path is provided as the first argument, and then prompts the user with Did you mean to send 'filename'? (Y/n). In most operating systems, when dragging a file on top of an executable, it'll open the executable with the absolute path of the file as the first argument.

The obvious downside is that you can't specify options from this prompt, like --relay or --format.

No files or tests are named. Start by reviewing sendme's command-line argument handling and compare it with the described croc behavior for no arguments and an absolute path. Done means double-clicking or passing a dragged file opens the appropriate receive or send prompt while preserving normal command-line options.