Implement `-fprint`

[hanbings]

refer: https://www.gnu.org/software/findutils/manual/html_node/find_html/Print-File-Name.html

Action: -fprint file

True; print the entire file name into file file, followed by a newline. 
If file does not exist when find is run, it is created; if it does exist, it is truncated to 0 bytes. 
The named output file is always created, even if no output is sent to it. 
The file names /dev/stdout and /dev/stderr are handled specially; 
they refer to the standard output and standard error output, respectively.

If there is the faintest possibility that 
one of the files for which you are searching might contain a newline, 
you should use ‘-fprint0’ instead.

[keys-i]

this is fairly simple i think

[keys-i]

i could add a bit for file in in printer.rs

[hanbings]

i could add a bit for file in in printer.rs

sure, go ahead :)

[keys-i]

im made some addition to printer

[keys-i]

just need to add them to mod.rs

[keys-i]

i just need to see if the tests run or not

[keys-i]

okay so i need to make sure everything is gnu ok

[hanbings]

okay so i need to make sure everything is gnu ok

hi, please feel free to open a PR if you're ready, thanks. :)