* Use dotnet-install.sh in .NET feature

* Use latest.version files

* Cleanup runtime args

* Use latest.version files in tests as well

* Improve tests, remove code duplication

* Add stderr helper

* Validate version inputs

* Use suggested description
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* Shorter version description
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* Shorter version description
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* Clean up apt lists

* Verify 7.0 is latest

* Fix PATH, add test for .NET global tools

* Include a copy of dotnet-install.sh in the Feature

* Configure useful env variables

* Use stringly typed booleans

* Keep imperative writing style in option hints

* Update maintainers
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* Move dotnet-install.sh into a vendor directory

* Refactor variables

* Amend

* Amend 2

* Use default options from devcontainer-feature.json

* Add back variables

* Fix shellchek warning in fetch_latest_sdk_version

* Inline install_version function

* Fix ShellCheck warnings

* Improve CSV parsing

* Default to latest when configuring an empty version

* Add support for runtime-only configurations

* Move 'none' check higher up

* Deduplicate helper functions, sort into files

* Address the user more directly in NOTES

* Remove unnecessary defaults

* Replace feature -> Feature
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* Add update-dotnet-install-script workflow

* Apply suggestions from code review
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

* Don't skip ci for automated script update

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Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>