refactor: integrate EvaluationClient and remove legacy evaluation actions

- Added EvaluationClient to clients/index.ts and created an instance for use.
- Updated client-wrapper.tsx and welcome-screen.tsx to utilize EvaluationClient for evaluation actions.
- Removed obsolete evaluation-actions.ts file to streamline codebase and reduce redundancy.

clients/index.ts

@@ -2,13 +2,16 @@
 import { SkillsClient } from "./domains/skills-client";
 import { AuthClient } from "./domains/auth-client";
 import { AdminClient } from "./domains/admin-client";
+import { EvaluationClient } from "./domains/evaluation-client";
 
 // Export all client classes
 export { SkillsClient } from "./domains/skills-client";
 export { AuthClient } from "./domains/auth-client";
 export { AdminClient } from "./domains/admin-client";
+export { EvaluationClient } from "./domains/evaluation-client";
 
 // Create and export client instances
 export const skillsClient = new SkillsClient();
 export const authClient = new AuthClient();
 export const adminClient = new AdminClient();
+export const evaluationClient = new EvaluationClient();