add extra feilds that will be needed in the course schema and dtos for client side integration

[Devesh21700Kumar]

Add extra fields that will be needed in the course schema and dtos for client side integration:-

1). tags with its enums 2). courseDetails 3). courseLevel 4). courseThumbnail 5). courseTrailerUrl

Also added the review schema and its dtos and its create, update and delete endpoints with its enums for training field

• [x] My code follows the code style of this project.
• [x] All new and existing tests passed.
• [x] My changes generate no new warnings
• [x] The title of my pull request is a short description of the requested changes.

[Devesh21700Kumar]

@Abhishek-kumar09 the extra fields that will be required have been added along with the review endpoints

[Devesh21700Kumar]

Please add swagger response body for this PR.

ok

[Devesh21700Kumar]

Please add swagger response body for this PR.

There is no option to get all the reviews on a course. Add a get request that fetches all the review for a course.

@Abhishek-kumar09 The reviews are populated in the getall courses in the reviews object and also in the getcoursebyId endpoint in the reviews object

[Devesh21700Kumar]

So with this, all reviews will be available for that course.

[Devesh21700Kumar]

@Abhishek-kumar09 the changes have been made

[Devesh21700Kumar]

@Abhishek-kumar09 courseLevel converted to enum type and @Isenum prop added to both and tags converted to array

[Devesh21700Kumar]

@Abhishek-kumar09 added swagger for the new routes and merged conflcts