Upgrade to Semantic Kernel 1.0

[umeshma]

TypeChat.NET now uses Semantic Kernel 1.0.

• TypeChat.SemanticKernel now supports the Semantic Kernel 1.0 programming model.
• Plugins example updated to use Semantic Kernel 1.0 Plugins programming model
• Semantic Kernel 1.0 introduces multiple changes to its programming model. Support for the prerelease version Semantic Kernel is deprecated but saved in the sk_prerelease branch.