Give a different error to guide use to install via global tools so, if several bundled DotnetTools cannot finish source build on time. The user can use global tools to get it.
The original plan that adding a different resolver is hard due to resolver can only find dll that will be used to spawn a process. However, the command constructor will give an error message when resolver find null. By adding a different error when the command name is part of the list, it can achieve the same goal.
