Install from Source Code does not install storyformats directory

[Tarinaky]

Describe the bug
Installing tweego from source (with go install) does not install storyformats, and the storyformats data is entirely missing from the github repository.

To Reproduce
git clone https://github.com/tmedwards/tweego
ls story* # No storyformats directory shown
go build
./tweego --help # error: Story format search directories not found.

Expected behavior
The storyformats directory should either be in the github repo, or instructions on where to download it added to the project README.

./tweego --help should return a description of the switches tweego supports and not return an error.

Desktop (please complete the following information):

• Tweego Version: v2.1.1 and main
• OS & Version: Debian Linux Bullseye

Additional context
Running tweego in strace shows that it is failing to find a $HOME/storyformats directory, although it tries a few permutations of capitalization.