Docs: updated documentation after the recent v8 changes

[mzajkowski]

We need to document the class changes and new abilities / possibilities to be done with the package (e.g. macro placement: #12).

Help needed here! The work can follow the current setup and styling, maybe with a better English ;)

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Things to be changed/improved:

• Screenshots from v8 (in the main branch)
• Info about the usage with a new object class from v8
• Info on how to use it with macros
• Anything else?