remove old release

[adamhathcock]

This pull request removes the existing .github/workflows/dotnetcore.yml GitHub Actions workflow and updates the solution file to reference a new workflow file, .github/workflows/nuget-release.yml, instead. This likely reflects a change in the project's CI/CD process, possibly consolidating or renaming workflows for clarity or updated release processes.

Continuous Integration / Workflow Updates:

• Removed the dotnetcore.yml workflow, which previously handled builds and artifact uploads for multiple operating systems.
• Updated the SharpCompress.sln solution file to reference the new nuget-release.yml workflow instead of the removed dotnetcore.yml.

[Copilot]

Pull request overview

This pull request removes an outdated GitHub Actions workflow and updates the solution file to reference the new workflow. The changes streamline the CI/CD configuration by replacing the basic dotnetcore.yml workflow with the more comprehensive nuget-release.yml workflow that already exists in the repository.

• Removes the legacy dotnetcore.yml workflow file that provided basic build and artifact upload functionality
• Updates the solution file reference to point to the new nuget-release.yml workflow

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/dotnetcore.yml	Complete removal of the legacy workflow file
SharpCompress.sln	Updated workflow reference from dotnetcore.yml to nuget-release.yml

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[adamhathcock]

@copilot nuget-release.yml should run for pull requests against master and release but never publish. Only when something is merged or tagged

[Copilot]

@adamhathcock I've opened a new pull request, #1099, to work on those changes. Once the pull request is ready, I'll request review from you.