Feat adjusting size status tab

[Hari-Oggy]

This Pull Request fixes/closes #2669.

It changes the following:

• Added dynamic layout resizing in the status view
• Introduced new keybindings (Alt+Arrow keys) to adjust horizontal and vertical splits
• Replaced hardcoded Constraint::Percentage values with configurable state

I followed the checklist:

• I added unittests
• I ran make check without errors
• I tested the overall application
• I added an appropriate item to the changelog

here is preview:
gituidynamicsizeworking.webm

[Hari-Oggy]

here is preview :

gituidynamicsizeworking.webm

[cruessler]

@Hari-Oggy Thanks for the PR!

@extrawurst @naseschwarz I’m wondering whether we should go for the manual solution presented in this PR or rather for an automatic one that doesn’t require manual intervention, but would make customization impossible. What do you think?

[cruessler]

@extrawurst @naseschwarz Friendly ping: what do you think about whether the left column’s width should be resized automatically by gitui vs. fully controlled by the user?

[Hari-Oggy]

In this PR, GitUI automatically manages the left column's width while still allowing users to manually adjust both width and height. This approach provides a responsive layout with user customization options.

Screencast.from.2025-10-23.10-15-02.webm

The preview shows two versions:

• Left side: Standard GitUI with automatic left column width
• Right side: Same layout with added user width customization options

[extrawurst]

an automatic one that doesn’t require manual intervention, but would make customization impossible. What do you think?

@cruessler what automated solution would that be?