feat: reduce amount of syscalls

eza version `v0.14.1 [+git]`

## `eza` syscall trace


## `ls` syscall trace


## Info
The folder `./target/debug/deps/` ( example folder , any folder with large number of files ) contains `677` files. ( all numbers based on this folder ).
I tested `multiple` times to `come to this`.


## readlink
`eza` makes `2708` `readlink` syscalls, which all fail. This syscall takes around `50-60%` of the execution time. "ls" checks whether a file is a symbolic link before calling `readlink`, while "eza" does not perform this check. (`ls` as `0` calls)

## getcwd
`eza` calls the `getcwd` syscall `677` times, for every file instead of caching it. (`ls` as `0` calls)


## statx
`eza` calls the `statx` syscall `678` times ,even when it does not need the file stats, which unnecessary.
It is not printing, then why call ? (`ls` as `0` calls)


## write
`eza` writes file individually, without using any buffering


# Summary
`ls` takes `72` syscall and `0.000422` seconds.
`eza` needs `4903` syscall and `0.029659` seconds.


`readlink` , `getcwd` , `statx`, `write` takes around `4700` syscall.

## `eza` takes `70` times more `syscalls` and `time`

The issue names no files or tests; first reproduce the syscall trace against a directory such as target/debug/deps and compare eza with ls. Trace the file traversal, metadata, symlink, working-directory, and output paths, then validate that unnecessary calls are reduced without changing CLI behavior.

Written by the indexing model from the issue text.