Added share-task feature and comment feature

[surajkumar22079]

Description

This PR adds the task sharing feature and the commenting feature to the TODO app. Both the backend and frontend have been updated to support these new functionalities.

Database Schema Changes

Two new databases have been added:

1. comment-db: Stores comments related to different tasks.
2. share-task-request-db: Stores task sharing requests.

Changes Overview

Backend

New Endpoints:

• POST /tasks/${taskId}/share-task-requests: Share a task with one or more users.
• GET /tasks/shared/${accountId}: Fetch all tasks shared with the current user.
• POST /tasks/${taskId}/comments: Create a new comment for a task.
• GET /tasks/${taskId}/comments: Get comments corresponding to a task.
• PUT /tasks/${taskId}/comments/${commentId}: Update a comment.
• DELETE /tasks/${taskId}/comments/${commentId}: Delete a comment.

Database Models:

• SharedTaskDB Schema: Defines the structure of shared tasks stored in the database.
• CommentDB Schema: Defines the structure of comments.

Controllers:

• SharedTaskController: Handles the HTTP requests for shared tasks.
• CommentController: Handles the HTTP requests for comments.

Services:

• SharedTaskService: Contains the business logic for managing shared tasks.
• CommentService: Contains the logic to manage adding and fetching comments.

Utils:

• SharedTaskUtil: Converts database objects to API responses.
• CommentUtil: Converts database objects to API responses.

Frontend

Components:

• SharedTaskList: Displays a list of tasks shared with the user.
• ShareTaskModal: Allows users to share a task with other users.
• CommentSection: Displays and manages the comments for a task.
• CommentForm: Allows users to add and edit comments.

Context:

• SharedTaskContext: Manages the state and actions related to shared tasks.
• CommentContext: Manages the state and actions related to comments.

Services:

• SharedTaskService: Handles API calls related to shared tasks.
• CommentService: Handles API calls related to comments.

Types:

• SharedTask: Defines the structure of shared task objects used in the frontend.
• Comment: Defines the structure of comment objects used in the frontend.

Tests

Automated Test Cases Added

• run tests using command : npm test