Docs: Filter

[EPajares]

@Ebubeker ones you are done with the implementation you can show @iremkapucuoglu how the filter works

### Tasks
- [x] Draft (Irem )
- [x] Check ((Ulrike)
- [x] Adjustments (Irem)
- [x] Final Check (Ulrike)

[AnaSasso]

Updated interface

[nihar1024]

Thanks for updating this @AnaSasso!

We still need to add a section on the spatial filter, which we can do within the next few days. I will let you know once Majk is done working on this.