fix: mentor profile page

[ruilopesm]

No description provided.

[reviewpad]

AI-Generated Summary: This pull request introduces a fix to the mentor profile page functionality in the 'MentorView' module. It modifies the way skills are processed and displayed. Before, the program used to render each individual skill via the 'SkillView' module. However, with the updates, skills are now directly converted to JSON data using the 'SkillJSON' module. Additionally, the pull request refines the code by removing the unnecessary double alias statement and splitting it into two separate alias statements for better readability. This change involves 3 insertions and 2 deletions in the 'lib/bokken_web/views/mentor_view.ex' file.