Adds the seqcli print command

[nblumhardt]

> seqcli help print
seqcli print [<args>]

Pretty-print events in CLEF/JSON format, from a file or `STDIN`

Arguments:
  -i, --input=VALUE          CLEF file to read, including the `*` wildcard; if
                               not specified, `STDIN` will be used
  -f, --filter=VALUE         Filter expression to select a subset of events
      --template=VALUE       Specify an output template to control plain text
                               formatting
      --invalid-data=VALUE   Specify how invalid data is handled: `fail` (
                               default) or `ignore`
      --no-color             Don't colorize text output

[nblumhardt]

This issue seems to impact the current binary we're shipping; in PowerShell, seqcli search --json | seqcli ingest --json fails, while the same is fine in the CMD shell.