Compute the power spectral density (PSD) based on an `eeg_lst`

object. For now it only uses Welch's method, so essentially it is a wrapper of the gsignal::pwelch function.

```
eeg_psd(
.data,
.method = "welch",
.config = list(window = function(x) 2^ceiling(log2(sqrt(NROW(x)))), overlap = 0.5, nfft
= NULL, detrend = c("long-mean", "short-mean", "long-linear", "short-linear",
"none"), range = "half")
)
```

## Arguments

- .data
A `eeg_lst`

object.

- .method
"welch" for Welch's method.

- .config
See gsignal::pwelch.