License and documentation updates

Adding module licenses. Minor updates to scripts and documentation including readme examples to use main branch.

Follow proxy settings and use wildcard for patch versions

Follows self-hosted runner proxy settings

Also introduces a wildcard for a patch version, allowing 3.1.x to install the latest release.

Package Authentication and Process Updates

• Removes use of obsolete .NET Core SDK releases endpoint
• Dependency updates for packages
• Improve documentation clarity
• Adds NuGet package authentication set-up, documentation in README.md

Deprecate version

Deprecate version

v1.1.0

Export dotnet_root

v1.0.2

Consume new toolkit

v1.0.1

Use dotnet-version (#16)

v1.0.0

V1 (#9)

* Consume new tool-cache

* Fix tests

* V1