progress: add pin message

[iyear]

Proposed Changes

Add pin message for progress bar, It will be displayed at the top of all active trackers.

Developers can display some dynamic information here (e.g. CPU, load, memory)

[coveralls]

Pull Request Test Coverage Report for Build 3168573360

• 27 of 27 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 99.78%

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Totals
Change from base Build 3120356346:	0.002%
Covered Lines:	3168
Relevant Lines:	3175

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💛 - Coveralls

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[jedib0t]

I like this feature and I see how this can be useful, but I think the interfaces can be finessed a bit more. I'll accept this change and deliver one more change on top to change the interfaces/keyboard a bit.

[jedib0t]

@iyear I've published a new release with support for Pinned messages that you contributed. Made some changes on top, but it contains the essence of what you designed: https://github.com/jedib0t/go-pretty/releases/tag/v6.4.0

[iyear]

@jedib0t More beautiful and elegant, thank you!

Please forgive my poor English XD.

[jedib0t]

@jedib0t More beautiful and elegant, thank you!

Please forgive my poor English XD.

Hey your English is fine. I really appreciate the contribution! 👍🏽