Feature Request: Use bundler by default when selected but fallback to system gem if installed

[fiveNinePlusR]

It would be nice to have a way to use the bundled version of solargraph first but fallback to the system gem if it's available. There are many times where you are working on a project that uses bundler but doesn't have solargraph as a dependency. for those times it would be nice to have a fallback without having to add it to the gemfile.