modularise the files

[fommil]

Let's split the disable rules into various files (or lists within one file) that indicate why something is banned:

• explicitly disabled
• disabled as synthetics
• explicitly or synthetically disabled
• IO not required
• allowed via Maybe.attempt (and friends)
• allowed via Maybe.fromNullable (and friends)

With these files we can construct the rules we need without duplication. e.g. deterministic exceptions should not require IO (in its excludes list) but present in the attempt list.

and then a "recommend" list after that of other rules.