feat: Support changelog property in scoop info and update #2067

[cesaryuan]

Description

#2067

• manifest: Add changelog property which is the changelog page for the program
• scoop-update: Show success message "See what's new in this update: $($manifest.changelog)" when updating successfully. It will be like this.

PS E:\04Code\Github\Scoop> . '.\bin\scoop.ps1' update sudo                
sudo: 0.200.01.26 -> 0.2001.01.26
.......
'sudo' (0.2001.01.26) was installed successfully!
See what's new in this update: https://github.com/lukesampson/psutils/changelog.md

• scoop-info: Show manifest changelog property if available

Name        : sudo
Description : An approximation of the Unix sudo command. Shows a UAC popup window unfortunately.
Version     : 0.200.01.26
Website     : https://github.com/lukesampson/psutils
Changelog   : https://github.com/lukesampson/psutils/changelog.md
License     : MIT
Updated at  : 2023/1/7 20:31:49
Updated by  : Cesaryuan
Binaries    : sudo.ps1

Motivation and Context

Relates to #2067

How Has This Been Tested?

Run sample command and check effect.

Checklist:

• I have read the Contributing Guide.
• I have ensured that I am targeting the develop branch.
• I have updated the documentation accordingly. (Sorry, don't know how to update wiki.)
• I have updated the tests accordingly.
• I have added an entry in the CHANGELOG.