Powershell and -replace regex against blank lines '^$'

Summary: Read this on how to construct the Windows command line for your app:
https://www.daviddeley.com/autohotkey/parameters/parameters.htm#CPP

Reference used http://www.daviddeley.com/autohotkey/parameters/parameters.htm#WINCRULESREPH
But it may have changed since then. I'm not sure if this is the rules for argv argument processing by the process.

Note that this probably needs to be a separate pre-parse regex for the cmd.exe parser as described here. this line then gets passed to the main regex below. However I have not looked into the rules until today. I will in the future. The two rule sets can be combined (probably), but it would be instructive to have them separate to see exactly the 2 stage process results. .
https://www.daviddeley.com/autohotkey/parameters/parameters.htm#WINCMDRULES
and
https://www.daviddeley.com/autohotkey/parameters/parameters.htm#PIT

(?:^[ \t]((?>[^ \t"\r\n]+|"[^"]+(?:"|$))+)|(?!^)[ \t]+((?>[^ \t"\\\r\n]+|(?

(?:
   ^ [ \t] 
   (                                 # (1 start), Command
      (?>
         [^ \t"\r\n]+          
       | 
         " [^"]+ 
         (?: " | $ )
      )+
   )                                 # (1 end)
 | 
   (?! ^ )
   [ \t]+                            # Delimeter
   (                                 # (2 start), Argument
      (?>
         [^ \t"\\\r\n]+ 
       | 
         (?

Note that multiple identical assertions in a row are just a single assertion.

^^^^^^^$ = ^$

https://regex101.com/r/LNebCc/1