v0.20.0-pre.5

What's Changed

• Bump version by @nathanielsimard in #4102
• Handle empty tensors in cat and slice_assign ops by @antimora in #4095
• Add network utilities to burn-std by @laggui in #4104
• Remove RefCell from onnx-ir Arguments by @antimora in #4094
• Fix raspberry pi pico example not compiling by @BjornTheProgrammer in #4034
• Flash Attention module by @louisfd in #4089
• [Breaking] Add IndexingUpdateOp to scatter and select_assign by @laggui in #4070
• Feat/improve errors by @nathanielsimard in #4110
• Add 256-byte tensor alignment to burnpack format for mmap zero-copy support by @antimora in #4100
• Add CrossAttention module to burn-nn by @huy209vn in #4101
• Add reflect and edge padding modes to tensor.pad by @antimora in #4105
• Add LSTM operator support with configurable activations by @antimora in #4106
• Add memory-mapped ONNX loading with lazy tensor data by @antimora in #4097
• Refactor RemoteDevice to use a thread-safe global address registry. by @crutcher in #4113
• Partial cleanup of RemoteSender api. by @crutcher in #4108
• Move backend traits and types to burn-backend by @laggui in #4111
• Fix remote sync error by @laggui in #4117
• Small LSTM clean up of unused variable by @antimora in #4116
• Fix/autotune checks by @nathanielsimard in #4114
• Include katex header as symlink by @laggui in #4118
• chore: Update cubecl by @wingertge in #4120
• Fix GLU and quiet softmax activations by @laggui in #4121
• Migrate ONNX import to burnpack format (removing Record type) by @antimora in #4122
• Combined PRs by @github-actions[bot] in #4140
• Chore/pre release 5 by @nathanielsimard in #4141