Feature Request: Move into nested module

[Ellipse0934]

The ability to switch into an arbitrary module will be helpful. For example

# In primary julia session
module M
        module N
        """
        Hello
        """
        f(x) = x + 1
        end
end

# In remote repl session
> %module M.N
> f(3)
4

I have been using

function Base.setproperty!(x::RemoteREPL.Connection, f::Symbol, v::Expr)
   x.in_module = Symbol(v)
end

in my startup script for probably a good 4-6 months now and it appears to work. We should figure out the correct (hygienic) method. And the docs search doesn't work when inside a module so we will need to figure that out.

[Ellipse0934]

Duplicate of #59 😅