Display line count next to file names

[rakotomandimby]

Feature request related to a problem

Having line count visible in the IDE file tree is useful because it gives instant context about a file without opening it.

• Quick size awareness → Spot large or complex files immediately.
• Better navigation → Know whether you’re opening a small tweak or a huge module.
• Refactoring hints → Oversized files often signal architectural issues.
• Code review planning → Helps estimate effort and prioritize work.
• AI-era control → Detect when generated code makes files grow too much.

Describe the solution you'd like

This is what I imagine

[gegoune]

Perhaps better approach would be to allow users create functions to format/add elements to display for various items (directories, files, maybe something else in the future).

[rakotomandimby]

I asked AI to propose something and this is its proposition: https://github.com/rakotomandimby/nvim-tree.lua/pull/1/changes

[alex-courtis]

I think we could use a :help nvim_tree.api.Decorator to achieve this.

The example shows icons (text) after the nodes.

Please attempt this @rakotomandimby and report your findings.