6 increase message limit from 200 to 250 characters

[raffertyuy]

Configuration Enhancements:

• .github/workflows/first-workflow.yml: Added a new GitHub Actions workflow named "My First Workflow" with jobs for echoing steps and using the cowsays-action.
• src/Application/src/RazorPagesTestSample/Properties/launchSettings.json: Added launch settings for the RazorPagesTestSample project.
• src/Application/tests/RazorPagesTestSample.Tests/Properties/launchSettings.json: Added launch settings for the RazorPagesTestSample.Tests project.
• src/Application/src/RazorPagesTestSample/RazorPagesTestSample.sln: Added a new test project to the solution and updated the solution configuration. [1] [2]

Dependency Updates:

• src/Application/src/RazorPagesTestSample/RazorPagesTestSample.csproj: Updated Microsoft.EntityFrameworkCore and Microsoft.EntityFrameworkCore.InMemory packages to version 8.0.8.
• src/Application/tests/RazorPagesTestSample.Tests/RazorPagesTestSample.Tests.csproj: Updated multiple package dependencies including Microsoft.AspNetCore.TestHost, Microsoft.EntityFrameworkCore, Newtonsoft.Json, and xunit.

New Tests:

• src/Application/tests/RazorPagesTestSample.Tests/UnitTests/DataAccessLayerTest.cs: Added a new test method Message_LengthValidation to validate message length constraints and ensure proper error messages are generated.

Minor Changes:

• src/Application/src/RazorPagesTestSample/Data/Message.cs: Increased the maximum allowed length for messages from 200 to 250 characters.
• src/Application/tests/RazorPagesTestSample.Tests/UnitTests/DataAccessLayerTest.cs: Added a new using statement for System.ComponentModel.DataAnnotations.

[raffertyuy]

oops, wrong place to do a pull request :)