feat: pop upgrade parachain upgrade parachain and print out the release changelog

[chungquantin]

It would be very helpful for parachain team to have this feature, we can simply build a wrapper over psvm but with better user experience. For example, reuse the diff files of base-parachain: https://github.com/r0gue-io/base-parachain/pull/26/files to guide the user how to upgrade their parachain. It does not need to 100% cover the changes but only some recommendations are good enough.

Release CHANGELOG printing can be Inspired by: https://github.com/moondance-labs/tanssi/blob/master/tools/github/print-version-bump-info.ts

$ pop upgrade parachain

Current version of the parachain: 1.10.0

> Enter the version of the release
[ ] 1.11.0
[ ] 1.12.0
[ ] 1.13.0
[ ] 1.14.0

[Daanvdplas]

We don't want to manually recommend changes per upgrade. What we make should be fully automated in my opinion.

[chungquantin]

@Daanvdplas I think automatically apply the changes is quite hard to implement because every Substrate project has different codebase. But if it can be implemented, it gonna be a killer feature for pop-cli