chore: update README attribution and add .vscode to gitignore

- Changed "Built with Claude Code" to "Assisted By Claude Code"
- Added .vscode/ to .gitignore to exclude IDE settings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: alirezarezvani

.gitignore

@@ -4,3 +4,4 @@ gh-workflow-master-instructions.md
 implementation.md
 .phase3-state.md
 examples/.DS_Store
+.vscode/

README.md

@@ -448,6 +448,6 @@ And provides:
 
 *Empowering developers with world-class automation* 🚀
 
-Built with [Claude Code](https://claude.com/claude-code)
+Assisted By [Claude Code](https://claude.com/claude-code)
 
 </div>