docs: Update README.md to clarify Banger Editor's purpose and improve…

… readability

- Revised the description to emphasize that Banger Editor provides essential ProseMirror components, reducing the need for custom builds.
- Enhanced clarity and conciseness to improve user understanding and onboarding experience.

README.md

@@ -1,6 +1,6 @@
 ## Banger Editor: ProseMirror Made Easy
 
-Banger Editor is a collection of ProseMirror editing components, designed for speed and efficiency.
+Banger Editor aims to provide missing pieces of ProseMirror components so you don't have to build them from scratch. And trust me, you don't want to build them from scratch.
 
 **Why Banger Editor?**