Add `bevy_error!` and `bail!` macros to `BevyError` (#23720)

# Objective

These macros were originally part of #23684 but were removed to help the
pr cross the finish line.

## Solution

Reintroduce and discuss them here.

## Testing

2 testcases to prove the expanded code compiles.

---

`bevy_ecs` has been expanded with 2 macros to simplify creation of
`BevyError`s.
```rust
// Now instead of this.
let error = BevyError::new(Severity::Panic, "hello error");
// You can do this. It even support `format!` syntax
let error = bevy_error!("{} bottles of beer on the wall.", 99);

// Quickly return from a fallible system using bail.
bail!("{} bottles of beer.", 99);
// Expands to something like this
return Err(BevyError::panic("Take on down, pass it around,");

// You can even specify the severity by passing it in as the first argument
bevy_error!(Severity::Debug, "{} bottles of beer on the wall.", 98);
```