- [x] Added a `CHANGELOG.md` entry

# Summary

As discussed in #1515, this PR replaces the implementation of
`poisson::RejectionMethod` with a new algorithm based on the [paper
](https://dl.acm.org/doi/10.1145/355993.355997).

# Motivation

The new implementation offers improved performance and maintains better
sampling distribution, especially for extreme values of lambda (> 1e9).

# Details

In terms of performance, here are the benchmarks I ran, with the current
implementation as the baseline:

```text
poisson/100             time:   [45.5242 cycles 45.6734 cycles 45.8337 cycles]
                        change: [-86.572% -86.507% -86.438%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  2 (2.00%) low mild
  2 (2.00%) high mild
  1 (1.00%) high severe
poisson/variable        time:   [5494.6626 cycles 5508.2882 cycles 5523.2298 cycles]
                        thrpt:  [5523.2298 cycles/100 5508.2882 cycles/100 5494.6626 cycles/100]
                 change:
                        time:   [-76.728% -76.573% -76.430%] (p = 0.00 < 0.05)
                        thrpt:  [+324.27% +326.85% +329.69%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  1 (1.00%) low mild
  3 (3.00%) high mild
  1 (1.00%) high severe
```

Closes #1561.

…ion (#1567)

Attempt to slightly improve the wording left by #1514.

…niform` (#1583)

- [x] Added a `CHANGELOG.md` entry

# Summary

Rename a function which is only used for testing because it clashes with
`std::simd`

# Motivation

CI fails otherwise

# Details

…ion<[T; N]> for StandardUniform` (#1585)

- [ ] Added a `CHANGELOG.md` entry

# Summary

Remove the leading underscore from the `_rng` parameter of the `sample`
method.

# Motivation

Because this parameter appears to be used. I think suppressing the
`unused_variables` lint is unnecessary.

# Summary

Requested in #1589