Implement From for anyhow errors

[thewh1teagle]

I would like to use question mark operator to propagate anyhow::Result inside functions which returns eyre::Result

fn main() -> eyre::Result<()> {
    example()?;
    Ok(())
}

fn example() -> anyhow::Result<()> {
    anyhow::bail!("anyhow error!")
}

error.log

the trait bound `anyhow::Error: std::error::Error` is not satisfied
the following other types implement trait `FromResidual<R>`:
  <Result<T, F> as FromResidual<Yeet<E>>>
  <Result<T, F> as FromResidual<Result<Infallible, E>>>
required for `ErrReport` to implement `From<anyhow::Error>`
required for `Result<(), ErrReport>` to implement `FromResidual<Result<Infallible, anyhow::Error>>`

Related: #178