FEAT: Implemented an endpoint to search for jobs by company name.

[medusa009]

Description

**Closes #426 **

Changes proposed

Added GET /api/v1/jobs/search/company-name to the Job controller.
Created a query and query handler in the Hng.Application project to handle the interface and logic of the endpoint according to the CQRS pattern.
I also added units tests for the query handler in the Hng.Application.Test project.

What were you told to do?

Implement an endpoint to search for jobs by company name.

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• This PR does not contain plagiarized content.
• The title and description of the PR is clear and explains the approach.
• I am making a pull request against the dev branch (left side).
• My commit messages styles matches our requested structure.
• My code additions will fail neither code linting checks nor unit test.
• I am only making changes to files I was requested to.

Screenshots

A job search for a company with a job post in the database returns a successful 200 status code.

A job search for a company without a job post in the database returns a 404 status code.

Test Passed

[Heba-WebDev]

A PR title should start with a key word that explains its type (Feat, Fix, Test etc). Also, no need to add the issue number to the endpoint of the title, it's referenced in your PR and already linked to it.

[medusa009]

A PR title should start with a key word that explains its type (Feat, Fix, Test etc). Also, no need to add the issue number to the endpoint of the title, it's referenced in your PR and already linked to it.

Done