Add nuget.config for local packages.
Add nuget.config for local packages.

trivalik/Cosmos,CosmosOS/Cosmos,trivalik/Cosmos,CosmosOS/Cosmos,zarlo/Cosmos,zarlo/Cosmos,tgiphil/Cosmos,jp2masa/Cosmos,zarlo/Cosmos,fanoI/Cosmos,fanoI/Cosmos,jp2masa/Cosmos,CosmosOS/Cosmos,zarlo/Cosmos,tgiphil/Cosmos,fanoI/Cosmos,jp2masa/Cosmos,tgiphil/Cosmos,trivalik/Cosmos,CosmosOS/Cosmos