Allow transient prompt alignment (segments or left/right_template or whatever...)

[joerohde]

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What would you like to see changed/added?

Related: 3844

Mostly care about powershell, but would like to use for zsh.
Pretty much a dup of referenced issue, but I'll give my use cases:

1. I have a multi-line prompt and I want to reduce it to 1 line with the more/most important info via transient mechanics.
2. Filler, which sort of works, should automatically be applied after the command input instead of before.

As opposed to going all out and supporting multiple segments, I would be thrilled just to have:
left_template -> alias for 'template'
right_template -> right aligned (after optional filler) template.

Image attached of my powerlevel10k zsh prompt usage that I'd like to replace. It looks noisy especially because I used short-output commands with a somewhat narrow screen to demo.

[joerohde]

BTW: If there's no philosophical issue with this, and you'd like to let me know what syntax/json form you prefer, I can take a shot at it. I'm good with go, but not so good with Powershell. :)