Final commit: Testing implementation + readme update

.gitignore

README.md

assets/dataset_small_old.json

assets/exit1.svg

assets/exit2.svg

assets/icon.png

background/index.ts

background/messages/ping.ts

background/messages/pingAdvanced.ts

background/messages/sendUrl.ts

components/category.svelte

components/compareBrands.svelte

components/dropdownButton.svelte

components/notActive.svelte

components/notSupported.svelte

components/ping.svelte

components/rating.svelte

components/ratingButton.svelte

components/similarBrands.svelte

components/simpleDataDisplay.svelte