Refine README formatting and content

Updated the README to improve formatting and clarity.

Author: jpomykala

README.md

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 A **very basic**, always-on-top floating text prompter for macOS.
 Perfect for quick videos, or keeping important text visible while you work.
 
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 ## Features
 - Always on top
@@ -12,9 +11,8 @@ Perfect for quick videos, or keeping important text visible while you work.
 - Pause on hover
 - Customizable speed and size
 
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 ## Screenshot
+<img width="1303" height="800" alt="SCR-20251206-nrty" src="https://github.com/user-attachments/assets/1c76dfd7-559f-4df1-9cd6-c183b7c538d6" />
 
 
 ## Contributing