Remove extra steps when trying out `tesseract-streamlit`

[dionhaefner]

Summary

Currently, a minimal workflow when using tesseract-streamlit is this:

$ tesseract serve foobar
...
$ tesseract-streamlit http://localhost:123567 app.py
$ streamlit app.py
<running streamlit app>

This is unintuitive and could be condensed to this:

$ $ tesseract serve foobar
...
$ tesseract-streamlit http://localhost:123567
<running streamlit app>

Or even this:

$ tesseract-streamlit --from-image foobar
<running streamlit app>

Why is this needed?

So I don't need to check the README every time I want to use the software :)

Usage example

See above