adding jsr badge

Author: Daniel Beeke

README.md

@@ -1,5 +1,9 @@
 # Text Store
 
+<a href="https://jsr.io/@shapething/textstore">
+  <img src="https://jsr.io/badges/@shapething/textstore/score" alt="" />
+</a>
+
 A thin wrapper around [N3 Store](https://github.com/rdfjs/N3.js) and [Flexsearch](https://github.com/nextapps-de/flexsearch) enabling in-memory fuzzy text search.
 
 ```TypeScript