Describe how to create multi tab app in docs/youtube

[pstorozenko]

Hello, I've watched the workshop from JuliaCon2023 and wanted to try out the GenieBuilder. I really wanted to create a multi tab app like in streamlit or shiny and I didn't menage to do it. First, I tried to use tabs/tab-panels from Genie Builder, then I tried copypasting examples from quasar, but I got errors like 500 Internal Error - UndefVarError: q__option__group not defined.

I truly believe that introducing docs on how to create multi tab application may benefit the adoption of Genie/GenieBuilder.

Cheers!