Rename ModelContextProtocol and ModelContextProtocol.Hosting packages #6
Description
We should rename the current "ModelContextProtocol" package to "ModelContextProtocol.Core". The current "ModelContextProtocol.Hosting" package should then be renamed to just "ModelContextProtocol" matching what the new "ModelContextProtocol.Core" package used to be named.
No namespaces should be changed except for "ModelContextProtocol.Hosting". Internal classes currently in the "ModelContextProtocol.Hosting" namespace can be moved to the "ModelContextProtocol" namespaces. Try to avoid any unnecessary changes to the code, but feel free to update things important to the packaging like the csproj descriptions to match the new package structure.
We should use the README at the root of the repo for the new "ModelContextProtocol" package that was previously called "ModelContextProtocol.Hosting". The current "ModelContextProtocol.Hosting" README should be deleted We should create a new README for the "ModelContextProtocol.Core" package that shows what's possible with just the core package which does not contain AddMcpServer.