Store whitelist conditions as predicate functions

[MattSturgeon]

This small refactor enables the collision whitelist to be more flexible.

The predicate builder now supports:

• Matching on block class (existing behavior).
• Matching on block ID string.
• Regex matching on block ID string.
• Matching using an arbitrary predicate function.

This PR could be expanded or followed up with:

• More explicit whitelists using block ID matching.
• User-configurable whitelists/blacklists edited vla a cloth-config.
  • Autoconfig creates a StringListListEntry for List<String> and String[] config fields.
  • I've played around a little with adding an "error supplier" to validate whitelist regex patterns.

[hashalite]

Looks good, thank you!