Remove "(prev Roo Cline)" from extension title in all languages (#6426)

feat: remove "(prev Roo Cline)" from extension title in all languages

- Updated all package.nls.*.json files to remove "(prev Roo Cline)" references from extension display names
- Updated all localized README.md files to remove "(prev Roo Cline)" references from titles
- Updated main README.md to remove "(prev Roo Cline)" reference from title
- Affects 18 language files and 18 README files across all supported locales

Co-authored-by: Roo Code <[email protected]>

Author: roomote[bot]

README.md

@@ -12,7 +12,7 @@
 </div>
 <br>
 <div align="center">
-  <h1>Roo Code (prev. Roo Cline)</h1>
+  <h1>Roo Code</h1>
   <p align="center">
   <img src="https://media.githubusercontent.com/media/RooCodeInc/Roo-Code/main/src/assets/docs/demo.gif" width="100%" />
   </p>