rust panic with CPU backend in xor example

[MellKam]

Hi! I just copied the xor example from the readme to test this library, but I couldn't run it. I also needed to add import for tensor1D, as it was not defined in the example.

> deno run -A ./src/xor.ts
Downloading https://github.com/denosaurs/netsaur/releases/download/0.4.2/libnetsaur.so
CPU Backend Initialized
thread '<unnamed>' panicked at crates/core/src/cpu/layers/dense.rs:65:59:
called `Result::unwrap()` on an `Err` value: ShapeError/IncompatibleShape: incompatible shapes
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread '<unnamed>' panicked at core/src/panicking.rs:221:5:
panic in a function that cannot unwind
stack backtrace:
   0:     0x7fd0c4375a3a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h7265b42392dc0061
   1:     0x7fd0c43965d3 - core::fmt::write::h2ec550f80b7defd0
   2:     0x7fd0c43733a3 - std::io::Write::write_fmt::h36bfe942596e7c0c
   3:     0x7fd0c4375882 - std::sys::backtrace::BacktraceLock::print::h91696b5f38231729
   4:     0x7fd0c43767a7 - std::panicking::default_hook::{{closure}}::h9bab7dd14eb60554
   5:     0x7fd0c43765d6 - std::panicking::default_hook::hf96ee8bd37f2a078
   6:     0x7fd0c4376d97 - std::panicking::rust_panic_with_hook::h78f8bdf8cf52544b
   7:     0x7fd0c4376bf6 - std::panicking::begin_panic_handler::{{closure}}::hefdc3b651bce153f
   8:     0x7fd0c4375f19 - std::sys::backtrace::__rust_end_short_backtrace::ha5a68a90f678ccff
   9:     0x7fd0c43768bc - rust_begin_unwind
  10:     0x7fd0c4394a9d - core::panicking::panic_nounwind_fmt::h2fd0917b1a8df192
  11:     0x7fd0c4394b32 - core::panicking::panic_nounwind::h545911dcc38f2643
  12:     0x7fd0c4394bf5 - core::panicking::panic_cannot_unwind::h3f615319d02b7fb8
  13:     0x7fd0c4318af4 - ffi_backend_predict
  14:     0x564290908052 - ffi_call_unix64
  15:     0x564293b813fa - ffi_call_int.llvm.8777122752065301370
  16:     0x564293b81171 - ffi_call
  17:     0x564293b4fe9c - <extern "C" fn(A0) .> R as v8::support::CFnFrom<F>>::mapping::c_fn::h8ff842577632e711
  18:     0x564231d8f1c6 - <unknown>
thread caused non-unwinding panic. aborting.
Aborted (core dumped)

> deno --version
deno 2.1.4 (stable, release, x86_64-unknown-linux-gnu)
v8 13.0.245.12-rusty
typescript 5.6.2

Platform: WSL2

[retraigo]

I think we forgot to update the example in the README. predict() will panic if you give it a tensor1D. Working examples can be found in the examples directory (like xor_cpu.ts).

Instead of tensor1D([0, 0]) it should be tensor2D([[0, 0]]) and so on.

Also it'd be helpful if this issue is left open so that we can keep the README change in our todo.