Enable Scalafmt in Scaladocs

[satorg]

The only significant change is in .scalafmt.conf:

- docstrings.style = keep
+ docstrings.style = Asterisk

After that, sbt prePR was applied.

Some manual fixes in Scaladoc were also necessary – not because Scalafmt "broke" something, but because a few existing Scaladocs were incorrectly formatted and were therefore treated as plain text. For example:

Details

A table defined in plain text like that:

Benchmark                                       Mode  Cnt         Score        Error  Units
ParTraverseBench.eitherParBitraversePointfree  thrpt   50  20201469.796 ± 143402.778  ops/s
ParTraverseBench.eitherParBitraversePointfull  thrpt   50  24742265.071 ± 133253.733  ops/s
ParTraverseBench.eitherParTraversePointfree    thrpt   50   1150877.660 ±  10162.432  ops/s
ParTraverseBench.eitherParTraversePointfull    thrpt   50   1221809.128 ±   9997.474  ops/s

had to be manually converted into Markdown:

| Benchmark                                     | Mode  | Cnt | Score        | Error        | Units |
|:----------------------------------------------|:------|:----|:-------------|:-------------|:------|
| ParTraverseBench.eitherParBitraversePointfree | thrpt | 50  | 20201469.796 | ± 143402.778 | ops/s |
| ParTraverseBench.eitherParBitraversePointfull | thrpt | 50  | 24742265.071 | ± 133253.733 | ops/s |
| ParTraverseBench.eitherParTraversePointfree   | thrpt | 50  | 1150877.660  | ±  10162.432 | ops/s |
| ParTraverseBench.eitherParTraversePointfull   | thrpt | 50  | 1221809.128  | ±   9997.474 | ops/s |

which is correctly interpreted by both Scaladoc and Scalafmt. Otherwise, it turns into a mess.

Why this change?

Two reasons:

1. Autoformatting helps maintain a consistent style across the repository, and Scaladoc is part and parcel of that.
2. It is especially valuable in the AI era, as it reduces unnecessary noise in PRs that AI agents tend to generate.

Why this particular style?

docstrings.style = Asterisk aligns best with the majority of existing Scaladocs in the repository.