Enable sending plugin command output to the log view

[jcordasc]

Is your feature request related to a problem? Please describe.

It can be a bit jarring when, running a plugin, the screen switches out of k9s and over to the command output, only to jump back when the command finishes.

Describe the solution you'd like

For foreground plugin commands that don't require input, the plugin author should be able to specify that the command output be displayed in the log view (or equivalent) such that the user remains in the k9s interface, output can be searched and scrolled, and the user chooses when to go back to the prior view.

Describe alternatives you've considered

Use of an external pager, or a prompt for user input before completing -- all as detailed in #1098.

Additional context

There seem to be a number of plugin output related requests: #2617, #1098, and #433.