#44 alt text for img on plant card, fix border styling issue, all cards have uniform height & transition on hover, added padding to PlantsOverview, removed margin

SUPER merge request von meiner lieblingsprogrammierin!! nur minikleine änderungen wurden vom  BOSS durchgeführt. das gibt eine beförderung =) =) =)

#43 use growbros fetcher for Wunschliste and Garten, improve FetchResult type, PlantDetails uses path param now

#43 include JWT in fetcher, reformatting and refactoring, add props and custom fetch methods to some components