First, that Isnt regarding the impeachment.

You talked about criminal court first...

Second, that was a civil matter, not criminal.

No, it was a criminal matter too.

Criminal charges would have been pressed if Clinton did not take a plea deal, part of which involved him admitting to committing perjury (a criminal act).

That’s why he didn’t proceed with criminal case

He did not proceed with the criminal case because Clinton took a plea deal.

Last, no source in that Wikipedia supports what you Bolded

What are you talking about??

It is literally sourced.

As set forth more fully below, the Independent Counsel concluded that while there were substantial federal interests to be served by prosecution, non-criminal alternatives to prosecution were sufficient to justify declination of a prosecution of President Clinton.

https://web.archive.org/web/20110321115604/http://www.gpoaccess.gov/icreport/lewinsky/sec4.pdf