Panic without `atlas` feature after v0.6.0 upgrade

[johanhelsing]

I'm not really sure if this is intentional or not, but I get a panic after upgrading from v0.5.0 to v0.6.0 (on native).

2023-04-07T15:28:53.676302Z ERROR wgpu::backend::direct: Handling wgpu errors as fatal by default
thread 'Compute Task Pool (11)' panicked at 'wgpu error: Validation Error

Caused by:
    In Device::create_texture
      note: label = `texture_array`
    Dimension Z value 4096 exceeds the limit of 2048

', C:\Users\Johan\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wgpu-0.15.1\src\backend\direct.rs:3024:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
2023-04-07T15:28:53.677043Z  INFO cargo_space::ldtk_integration: Level event: Transformed("58e02ac0-5110-11ed-b070-cdccc74eaccd")
2023-04-07T15:28:53.677162Z  INFO cargo_space::ldtk_integration: Level event: Transformed("58e02ac0-5110-11ed-b070-cdccc74eaccd")
thread 'Compute Task Pool (11)' panicked at 'A system has panicked so the executor cannot continue.: RecvError', C:\Users\Johan\.cargo\git\checkouts\bevy-899673624796a25d\7b9124d\crates\bevy_ecs\src\schedule\executor\multi_threaded.rs:194:60
thread '<unnamed>' panicked at 'called `Option::unwrap()` on a `None` value', C:\Users\Johan\.cargo\git\checkouts\bevy-899673624796a25d\7b9124d\crates\bevy_tasks\src\task_pool.rs:376:49
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: RecvError', C:\Users\Johan\.cargo\git\checkouts\bevy-899673624796a25d\7b9124d\crates\bevy_render\src\pipelined_rendering.rs:136:45
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', C:\Users\Johan\.cargo\git\checkouts\bevy-899673624796a25d\7b9124d\crates\bevy_tasks\src\task_pool.rs:376:49
error: process didn't exit successfully: `target\debug\cargo_space.exe --dev --join-private 123 --next 1` (exit code: 101)

The panics go away if I enable the atlas feature.

If intentional, maybe either provide a more helpful error/panic message, or put a note in the breaking changes section of the release notes: https://github.com/Trouv/bevy_ecs_ldtk/releases/tag/v0.6.0 ?