- add page with downloadable materials

[EwelinaSkrzypacz]

In this pr, I added page with downloadable materials, like brand book and logo.

[mtracz]

PS.
I think adding more readable commit messages than wip will help in code review understand what is going on in the current commit.

[EwelinaSkrzypacz]

PS. I think adding more readable commit messages than wip will help in code review understand what is going on in the current commit.

I will try