Support conversion of prices between per-lot and per-unit when printing

[NobbZ]

It would be nice if there was a way to hledger print with price conversion or normalized display.

Lets take the entry:

2025-01-01 Example
  assets:crypto:BTC   2.00 BTC @ 50,000 EUR
  assets:checking

and the imaginary hledger print --per-lot would print

2025-01-01 Example
  assets:crypto:BTC   2.00 BTC @@ 100,000 EUR
  assets:checking

A vice-versa equivalent would be nice as well.