feat: ✨ Retrieve articles by date for Pakistan

[Aisha630]

Feature: Fetch Articles by Date Endpoint

This PR introduces a new endpoint to fetch news articles published on a specific date in Pakistan from Dawn.com. The route is structured as:

GET /api/v1/date/:date

Functionality

• Accepts a date parameter in YYYY-MM-DD format.
• Scrapes the Pakistan section on Dawn.com for articles published on that date.
• Returns a structured JSON response including:
  • headline
  • URL
  • publish time
  • excerpt

Swagger Documentation

• Updated Swagger annotations to include the new endpoint.
  This pull request includes several updates and improvements to the Dawn News API project. The changes include adding a new endpoint to fetch news articles by date, improving error handling, updating the Swagger documentation, and upgrading dependencies.

Testing & Linting

• Improved error handling and updated dependencies
• Manually tested the new endpoint through Swagger UI and confirmed correct responses.
• Ensured the implementation adheres to existing project patterns.
• Ran the following tools to ensure code quality and correctness:
  • golangci-lint
  • go vet