Improve show

[bkamins]

Now when printing elements of NamedArray show without MIME is called, which causes too much information to be printed, for example with InlineStrings.jl:

julia> s = InlineStrings.inlinestrings(["a", "b", "a"])
3-element Vector{InlineStrings.String1}:
 "a"
 "b"
 "a"

julia> FreqTables.freqtable(s)
2-element Named Vector{Int64}
Dim1         │
─────────────┼──
String1("a") │ 2
String1("b") │ 1

[andreasnoack]

This was fixed in #125 so it can be closed