sprints: add schedule and links

[cmaureir]

• Adding the schedule section for the sprint day
• Adding "buttons" to the header banner for quick access
• Adding documentation icon for the projects descriptions

[netlify[bot]]

Deploy preview for laughing-wiles-cc82fb processing.

Building with commit be4425471692826b01b0ef233e1201f18150f485

https://app.netlify.com/sites/laughing-wiles-cc82fb/deploys/5f88a9b800a2400008942209

[cmaureir]

Feedback is welcome once the build is ready to preview ;)

[cmaureir]

let's see how does it look with the am/pm

[cmaureir]

:+1: or :-1: ?

[jtpio]

Looks good, and it's the same format as for the talks schedule.

[jtpio]

Thanks!