Generating Agenda page based on pretalx

[avivzk2]

• I have code for this too (like speakers)
• Will check on how to do this

[shaib]

We currently have the Pretalx agenda widget on the site, but it's not optimal because of issues with the six rooms in different days.

Perhaps this should be handled in a separate ticket (maybe even on the https://github.com/Hamakor/pycon-il-dockerized-pretalx repo)