docs: general correction across all the pages

docs: update the titles for all files

docs: improve wording, style, and use more visual ways

docs: updating `main classes` page and some corrections

docs: update pages with the new media for testing zensical

docs: update the parsing section

docs: Add the `remove_entities` argument

docs: Style updates and a lot of clarifications

docs: update an outdated part

docs: Update the 'main classes' page

First version of Scrapling full documentation