Native MacOS filepicker

Summary:

This is more of an improvement request or a discussion than an issue, thought it might be useful to track a discussion since I haven't seen it brought up previously. But I think the user experience would be much improved by using the native macos file picker instead of the current (GTK?) one while using Macos. The main issues I've seen being that things like your pinned folders and other things like google drive directories do not show up in the GTK picker.

Steps to reproduce:

• open Inkscape
• open file picker

Version info

Inkscape 1.3.2 (091e20e, 2023-11-25)

    GLib version:     2.76.3
    GTK version:      3.24.38
    glibmm version:   2.66.6
    gtkmm version:    3.24.7
    libxml2 version:  2.11.4
    libxslt version:  1.1.35
    Cairo version:    1.18.0
    Pango version:    1.50.14
    HarfBuzz version: 8.0.1

    OS version:       macOS 14.4.1 (23E224) arm64