Add heroshot - documentation screenshot automation (#74)

Co-authored-by: Ondrej Machala <ondrej@macha.la>

Author: omachala

README.md

@@ -66,6 +66,7 @@
 - [playwright-magic-steps](https://github.com/vitalets/playwright-magic-steps) - Auto-transform JavaScript comments into Playwright steps.
 - [playwright-network-cache](https://github.com/vitalets/playwright-network-cache) - Speed up Playwright tests by caching network requests on the filesystem.
 - [@global-cache/Playwright](https://github.com/vitalets/global-cache) - A key-value cache for sharing data between parallel workers and test runs.
+- [Heroshot](https://github.com/omachala/heroshot) - Documentation screenshot automation. Visual picker to define screenshots, one command to regenerate them all.
 
 ## Reporters