feat: add skill creation functionality and reload categories

- Introduced a new button to create skills within the SkillSelector component, allowing users to add missing skills directly.
- Implemented a dialog for skill creation, including a form to handle new skill submissions.
- Added a reloadSkillCategories function in the useEvaluation hook to refresh skill categories and migrate existing evaluations if necessary.
- Enhanced error handling for category reloading to improve robustness.

hooks/use-evaluation.ts

@@ -129,6 +129,24 @@ export function useEvaluation() {
     }
   };
 
+  const reloadSkillCategories = async () => {
+    try {
+      const categories = await loadSkillCategories();
+      setSkillCategories(categories);
+      
+      // Si on a une évaluation en cours, la migrer avec les nouvelles catégories
+      if (userEvaluation) {
+        const migratedEvaluation = migrateEvaluation(userEvaluation, categories);
+        if (migratedEvaluation !== userEvaluation) {
+          setUserEvaluation(migratedEvaluation);
+          await saveUserEvaluation(migratedEvaluation);
+        }
+      }
+    } catch (error) {
+      console.error("Failed to reload skill categories:", error);
+    }
+  };
+
   const updateProfile = async (profile: UserProfile) => {
     const evaluations =
       userEvaluation?.evaluations || createEmptyEvaluation(skillCategories);
@@ -379,5 +397,6 @@ export function useEvaluation() {
     removeSkillFromEvaluation,
     initializeEmptyEvaluation,
     clearUserProfile,
+    reloadSkillCategories,
   };
 }