Implement Bookmark and Like Features for Posts

From now on, the like, unlike, bookmark, remove bookmark and get bookmarked posts feature is implemented into backend api. here is the updated endpoints: POST /api/posts/{postId}/like - Like a post DELETE /api/posts/{postId}/like - Unlike a post POST /api/posts/{postId}/bookmark - Bookmark a post DELETE /api/posts/{postId}/bookmark - Remove bookmark of a post GET /api/posts/bookmarked - Get all bookmarked posts for the current user

Each post response will now include: likeCount: Total number of likes isLiked: Whether the current user has liked the post isBookmarked: Whether the current user has bookmarked the post

if user is not authenticated (guest user), this error returns with status code 401 Unauthorized: { "message": "You must be logged in to perform this action", "timestamp": "2024-11-25T04:54:49.8285567" }

Opening PR.

bounswe / bounswe2024group7

Implement Bookmark and Like Features for Posts #202