Add new command reference articles

[meaghanlewis]

Summary

This pull request adds documentation for new .NET CLI commands and updates navigation and index files to include these commands. The main focus is on introducing the dotnet workload clean, and dotnet workload history commands, ensuring they are discoverable and properly described in the documentation.

New command documentation:

• Added documentation for the dotnet workload clean command, describing its purpose, options, and usage examples.
• Added documentation for the dotnet workload history command, including its function and options.

Navigation and index updates:

• Updated docs/core/tools/dotnet.md to list the new commands (dotnet workload clean, dotnet workload config, dotnet workload history, and dotnet workload restore) in the appropriate command tables. [1] [2]
• Updated docs/core/tools/index.md to include workload clean and workload history in the list of default installed commands.
• Updated docs/navigate/tools-diagnostics/toc.yml to add navigation entries for dotnet workload clean, and dotnet workload history. [1] [2]

Fixes #48686

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Internal previews

📄 File	🔗 Preview link
docs/core/tools/dotnet-workload-clean.md	dotnet workload clean
docs/core/tools/dotnet-workload-history.md	dotnet workload history command
docs/core/tools/dotnet.md	dotnet command
docs/core/tools/index.md	docs/core/tools/index
docs/navigate/tools-diagnostics/toc.yml	docs/navigate/tools-diagnostics/toc