PaulJuliusMartinez
Different preview modes: full, count, none
Adds two new ways to preview child nodes (only in --mode line, doesn't affect --mode data).
The existing single way full:
The first new way count shows objects as { N items }, where N is the number of key-value pairs. It shows [ N items ] for arrays.
The second new way none just removes the child counts/previews entirely:
Closes #38
This PR could also close #37, which asks to just hide the previews.
It might also close #33, which asks the previews to be rendered conditionally. Maybe just switching from the full previews to a count-of-children would be sufficient for that issue's purposes.
See https://github.com/PaulJuliusMartinez/jless/issues/38#issuecomment-1044974865 for a bit more context around 6f71ce0 and 26a6059
