Refactor fifo code and add explorer (#1075)

Refactor fifo code and add explorer (#1075)

* Refactor fifo code and add explorer

* add explorer option and flag

* notify explorer fifo on selection

* close explorer fifo file descriptor

* Try to create explorer fifo if doesn't exist

This doesn't quite work

* Allow uncreated fifos

* delete persistence fifo on cleanup

with correct formatting

Co-authored-by: luukvbaal <31730729+luukvbaal@users.noreply.github.com>
* Work correctly with NOFIFO

* Refactor variable names

* fix

* Use -X flag for explorer mode

* Update manpage with explorer mode

Co-authored-by: luukvbaal <31730729+luukvbaal@users.noreply.github.com>