One of the changes I've proposed in rwmt#411, without any API implementation.

List of changes:
- `VerbOwnerType` enum was removed and replaced by `supportedVerbOwnerTypes` array
- The array includes `typeof(Thing)` in stead of `typeof(Pawn)` for increased compatibility
- `IVerbOwner` sync worker entry was added
- `Verb` sync worker entry was modified to sync the owner as `IVerbOwner`

Those changes should result in greater compatibility, as new supported `IVerbOwner` types can now be added to the array and synced using their own sync workers.

This should also end up simplifying `Verb` sync worker going forward, as we won't have to expand it anymore in the future - only the array of supported types.

Things that I did not include, but we may want to potentially consider:
- Add more vanilla types to the list of supported verb owners, which could include:
  - `HediffComp` (specifically for `HediffComp_VerbGiver`) - however, in vanilla RW they don't have gizmos, but a mod could add a comp that adds one
  - `Pawn_MeleeVerbs_TerrainSource` - likely will never gizmos, probably will be completely pointless to include
  - `Pawn_NativeVerbs` - same as above
- Automatically including all subtypes of `IVerbOwner` which have an explicit sync worker
  - Would simplify mod compat, as mods would (likely) never need to modify the list of supported verb owners
  - Could have potentially unintended consequences?

I've placed `IVerbOwner` sync worker in the `Interfaces` region, which I've placed at the very bottom. This is due to issues with syncing `IVerbOwner` - for example, trying to sync a `Pawn` caused it to be synced as `IVerbOwner`, which caused it to be recursively synced as `IVerbOwner` until the game crashed.

Placing it lower fixed the issue.

…ult"

This reverts commit 6a96199.