[feature] consolidate file import info text

[pdimens]

Is your feature request related to a problem and which?
Consolidate the printing of file information a bit. The idea is to have fewer lines and be more succinct overall.

Describe the solution/feature you'd like (with examples)

julia> @info "\n path_to_filename.gen\n formatting: delimiter = tab , loci = horizontal\n data: samples = xxx, populations = yy, loci = zzzz"
┌ Info: 
│  path_to_filename.gen
│  formatting: delimiter = tab , loci = horizontal
└  data: samples = xxx, populations = yy, loci = zzzz

** screenshot **
Proposed:

Current: