Create initial empty vslam-sandbox GUI

[vadixidav]

This task is to get vslam-sandbox running with a simple GUI. The command line arguments should be used exactly the same way they are today, but the GUI should contain info logs as if one used RUST_LOG=info at the command line. The GUI and application exit after all the processes that are currently done are done. GUI should be made with iced for wgpu compatibility.

[codec-abc]

A quick question here, the GUI and the command line arguments should become a single executable of do you want to keep them separate? if yes, how the program should know if the program should run in command line or open a window?

[vadixidav]

@codec-abc vslam-sandbox will become the GUI. You can pass command line arguments to a GUI. When it runs, it will always open a GUI. It will just perform the same things it does today, but with the logs displayed in the GUI.

[codec-abc]

Ok I understand more what you have in mind. My question was more about headless servers. Because today, it should work almost anywhere but if we required a GUI (especially since a one that draw 3D with webgpu) it might not work everywhere or could crash because of some faulty drivers or something else.

[vadixidav]

We can create a series of separate command line utilities later. vslam-sandbox should become a GUI only. At some point we can take the various functions it performs and turn them into separate utilities. What it was doing before was running everything all-in-one, but we will want to split everything out a bit more so a user can run small steps at the command line. Alternatively, we might create some kind of command line thing that takes in a list of operations to perform in a batch to avoid saving/reloading. However, vslam-sandbox will remain just a GUI, and we can make all of that later.