docs: enhance README with branding elements and introductory tagline

Author: 29deepanshutyagi

README.md

@@ -1,5 +1,13 @@
+
 <div align="center">
 
++  <div style="font-size:64px;line-height:1">🦉</div>
++  <br />
++  <sub>Making Solana storage affordable, one byte at a time</sub>
++  <br /><br />
+
+
+
 #### 💡 Why OWLSOL?
 
 - **💰 Save Money**: Reduce Solana account rent by 60-80%