Cli transaction: Print the full uninstall/install/update lists in ready

This lets you see what operations will happen and you can confirm
it before starting the heavy operations.

Closes: #1797
Approved by: alexlarsson
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f