coverlet.console with exit codes (ExitCodes.cs)

[Bertk]

• Backport from PR use latest System.CommandLine version (GA?) #1660
• Solves [BUG] regression: coverlet.console missing exit codes #1747

[Copilot]

Pull Request Overview

This PR backports changes to support exit codes in coverlet.console, addressing issue #1747 and merging relevant changes from PR #1660. Key changes include updating project dependencies and references, modifying exit-code handling in both tests and the console program, and adjusting documentation accordingly.

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/coverlet.integration.tests/coverlet.integration.tests.csproj	Added a project reference for coverlet.console to the integration tests
test/coverlet.integration.tests/Msbuild.cs	Updated test assertions to use a static expected result string
test/coverlet.integration.tests/DotnetTool.cs	Captured and asserted command exit codes for tool invocations
test/coverlet.integration.template/DeepThought.cs	Added an uncovered method for testing coverage reporting
src/coverlet.console/Program.cs	Revised exit code handling by replacing local exitCode with a static field s_exitCode and updating logging behavior
src/coverlet.console/ExitCodes.cs	Removed the CommandParsingException exit code (102)
Others	Updated dependencies and documentation to reflect exit-code changes

Comments suppressed due to low confidence (1)

src/coverlet.console/Program.cs:361

• Overwriting s_exitCode here may result in losing earlier error information (e.g. a test failure being masked by a subsequent threshold failure). Consider whether aggregating errors or prioritizing one exit code over the other is the intended behavior.

s_exitCode = (int)CommandExitCodes.TestFailed;