Include exclusion instructions into advice messages

**Is your feature request related to a problem? Please describe.**

The plugin produced the following advice:

```
Advice for :amountslider-sample
Unused annotation processors that should be removed:
kapt libs.dagger.compiler
```

I'd like to exclude `libs.dagger.compiler` from the unused annotation processors check, but since the "exclude" API has many overloads, it's unclear how to do it correctly. E.g., this doesn't work (I'm basically just passing advice output as a string):

```kotlin
issueHandler.onUnusedAnnotationProcessors { issue ->
issue.exclude("kapt libs.dagger.compiler")
}
```

But this does:

```kotlin
issueHandler.onUnusedAnnotationProcessors { issue ->
issue.exclude(libs.dagger.compiler)
}
```

**Describe the solution you'd like**

I want the advice to include instructions on proper exclusion syntax, e.g.:

```
Advice for :amountslider-sample
Unused annotation processors that should be removed:
kapt libs.dagger.compiler

To exclude these annotation processors from the analysis:
issueHandler.onUnusedAnnotationProcessors { issue ->
issue.exclude(libs.dagger.compiler)
}
```

Or something similar.

**Describe alternatives you've considered**

Can't think of any alternatives.

**Additional context**

None.

Start at the issueHandler.onUnusedAnnotationProcessors entry point and the issue.exclude API shown in the report. Trace how the unused annotation processors advice is assembled, then add guidance showing the proper exclusion syntax. Done means the generated advice includes a usable exclusion example for the reported processor.

Written by the indexing model from the issue text.