[FEATURE] Add CodeClimate coverage report

Description
We need to integrate Code Climate into our CI/CD pipeline to generate coverage reports for our project. This integration will help us maintain code quality and provide insights into our test coverage over time.

Context
The current configuration for our AppVeyor build can be found here. We need to update this configuration to include Code Climate coverage reporting.

Resources

Acceptance Criteria

Code Climate should be integrated into our build process.
Coverage reports should be sent to Code Climate after each build.
The setup should be documented in the repository.

Proposed Solution

Create a Code Climate Token
Sign up or log in to Code Climate, create a new repository, and obtain your repository token.

Update AppVeyor Configuration
Modify the appveyor.yml file to include the necessary steps for Code Climate integration. Below is a sample configuration snippet:

# appveyor.yml
version: '{build}'
configuration: Release
platform:
 - x64

before_build:
 - nuget restore

build_script:
 - msbuild /p:Configuration=Release

after_test:
 - dotnet tool install --global dotnet-reportgenerator-globaltool
 - reportgenerator -reports:./Tests/coverage.cobertura.xml -targetdir:./Tests/coverage-report -reporttypes:Html
 - curl -X POST -H "Content-Type: application/json" -d "{\"data\":{\"attributes\":{\"branch\":\"$APPVEYOR_REPO_BRANCH\",\"commit\":\"$APPVEYOR_REPO_COMMIT\",\"coverage\":\"$(cat ./Tests/coverage-report/coverage.cobertura.xml)\"}}}" "https://api.codeclimate.com/v1/test_reports?project_id=<your_project_id>" -H "Authorization: Token <your_code_climate_token>"

Replace <your_project_id> and <your_code_climate_token> with your actual Code Climate project ID and token.

Install Required Tools
Ensure that the dotnet-reportgenerator-globaltool is installed to generate the coverage reports.
Verify Integration
Push your changes and verify that the Code Climate coverage report is correctly uploaded after each build.

Additional Context
Make sure you have your Code Climate project set up and that you have the necessary permissions to push coverage reports. This integration will enable continuous monitoring of our code quality.

guibranco / holiday-api-rust

[FEATURE] Add CodeClimate coverage report #26