### Tasks
- [x] .Net: Skill->Plugins: Existing skills Nuget packages and direct dependants
- [x] .Net: Skill->Functions: GRPC and OpenAPI Nuget packages and direct dependants
- [x] .Net: Skill->Plugins: SK Core and Abstractions
- [x] .Net: Skill->Plugins: Update integration tests
- [x] .Net: Skill->Plugins: Update sample skills and examples
- [ ] https://github.com/microsoft/semantic-kernel/issues/2970
- [ ] .Net: Skill->Plugins: Update Matthews document
- [ ] https://github.com/microsoft/semantic-kernel/issues/2127
- [ ] https://github.com/microsoft/semantic-kernel/pull/2943
- [ ] https://github.com/microsoft/semantic-kernel/pull/2937