Article I, Section 3 of the Constitution: “Judgment in cases of impeachment shall not extend further than to removal from office, and disqualification to hold and enjoy any office of honor, trust or profit under the United States.”
So, the idea that Vice President Pence could pardon an impeached President Trump, appoint him as his VP and resign in order to restore status quo is not possible.
Remember Ford pardoned Nixon, but it happened before any indictments before a Grand Jury. Impeachment was not yet passed through Congress.
They wanted to impeach Clinton, but that got so fucked up, that before it was all over getting a blow job is not even mentionable, but sexual harassment is a HUGE crime, oral sex is not really sex and we still do not know what the "meaning of is is."