Implement Searchbar

[SoulKa]

The sidebar should have a searchbar to search for requests using key words. Our current design already supports this.

Target design:

Acceptance Criteria

• The searchbar design matches the figma
• The searchbar filters requests for the given input word by word. If not input given, all requests are shown

[vicky16898]

I will work on this.

[giemic8]

@vicky16898 Have you already started with this ticket? Because the implementation of #181 will fundamentally change this ticket again. So if you haven't started yet, please look for another ticket. Thanks for your help.

[giemic8]

@vicky16898 #181 is closed you can work on this if you want