feat: setup number of examples per page

fix: remove too much examples

feat: implement load collection from dotenv in webapp

fix: type in examples

feat: add examples to gradio

feat: add setting up collection from .env

feat: add links to presentations and questions in webapp

feat: configure params, add description

refactor: parameterize formatting of output

refactor: return only text from presentation format.

feat: simplify ui

fix: errors with gradio

feat: implement gradio interface with adjustments to prerendered elements

feat: gradio render. pdf not displayed

refactor: convert gradio inputs to dicts

feat: add gradio web app