chore: add link to docs to README

Author: lemontree210

README.md

@@ -2,3 +2,7 @@
 Where you don't need pandas yet. Tools to work with TXT, CSV, Excel etc.
 
 [![codecov](https://codecov.io/gh/lemontree210/tinybear/graph/badge.svg?token=S0XIMP99YU)](https://codecov.io/gh/lemontree210/tinybear)
+
+## Documentation
+
+Available [here](https://lemontree210.github.io/tinybear/).