Update 'README.md'

added a screenshot

README.md

@@ -1,3 +1,5 @@
+![A screenshot of the Qur'an Study Tool, with an explanation up on the right of the screen](https://m1s5.c20.e2-5.dev/files/images/quran-study-tool-preview-optimized.png)
+
 # Quick Explanation
 
 This is a tool meant to help people study the Qur'án in the original Arabic. It uses Google Gemini to produce translations, word breakdowns, context, or tafsir for the selected 'ayat.