docs: enhance README with additional features and visuals

Updated README to include new features and images.

Author: sichengchen

README.md

@@ -1,10 +1,23 @@
+<p align="center">
+  <img width="128" height="128" alt="RYM Release Export" src="https://github.com/user-attachments/assets/9a5636f6-046e-4174-92d0-02529486c385" />
+</p>
+
 # RYM Release Export
 
 Chrome extension for exporting metadata from a Rate Your Music release page.
 
-- download the current release as JSON
-- queue multiple releases into a local bulk list
-- export the bulk list as JSON
+Export metadata as JSON:
+<p align="center">
+  <img width="600" height="343" alt="re-main-ui" src="https://github.com/user-attachments/assets/d094f517-aad2-4d83-8032-cdd09a5ba88c" />
+</p>
+<p align="center">
+  <img width="400" height="480" alt="re-json-output" src="https://github.com/user-attachments/assets/350ad770-4378-4604-ada4-44ef7dd98b39" />
+</p>
+
+Bulk export multiple albums:
+<p align="center">
+  <img width="400" height="273" alt="re-bulk-export" src="https://github.com/user-attachments/assets/b0857e86-36d2-4d9d-9287-a88e74d375cc" />
+</p>
 
 ## What It Extracts