* feat: add hide / unhide preview or results and prompt
* fix edit actions while only preview window is active
* add option to start telescope without previewer -> "disable_previewer_at_startup"
* remove hide / unhide prompt and resutls, improve hide / unhide preview
* fix tests - check if popup window should be created with borders - popup.create does not support setting borderhighlight and border=false
* allow toggle preview even if preview is set to false
* reuse recalculate_layout in hide / unhide preview
* add docs to toggle preview
* check if preview window is valid window
* remove unnecessary changes
* cleanup, remove unnecessary changes
* close all previewers, refactor toggle preview code
[docgen] Update doc/telescope.txt
skip-checks: true
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