fix: ensure examples building

[nielsdekoeijer]

Nice library, to see if I wanted to use it I proposed a few fixes.

A few changes:

• Made a few examples were not building, due to changes in zig 0.15.1 and bugs in the library.
• Fixed two cleanup bugs.
• For the image example, the image "vaxis.png" was giving me EOF errors. However, "zig.png" works so I switched to that.
• Suppressed logging on the examples as it was printing during the examples. In some cases, it also prevents a small flicker on startup, where it briefly prints before the app starts. Let me know if you think this approach is suitable.

If theres anything about the way I've done it that isn't agreeable let me know, I'm happy to make the changes for you.

[nielsdekoeijer]

Removed the flake.nix I had added by accident