Add mentor and learning status updates to skill evaluation

- Introduced `updateSkillMentorStatus` and `updateSkillLearningStatus` functions to manage mentor and learning preferences for skills.
- Updated `SkillEvaluationCard` to include buttons for toggling mentor and learning statuses with corresponding icons.
- Enhanced `SkillEvaluationGrid` and `SkillEvaluation` components to pass new status update handlers.
- Modified `SkillEvaluation` type to accommodate new properties for mentor and learning status.

lib/types.ts

@@ -48,6 +48,8 @@ export interface UserProfile {
 export interface SkillEvaluation {
   skillId: string;
   level: SkillLevel;
+  canMentor?: boolean;
+  wantsToLearn?: boolean;
 }
 
 export interface CategoryEvaluation {