fix(D-01/D): checkup cleanup — 5 issues resolved

1. LockableComponent: remove duplicate "Lockable" tooltip line
   (ILockable.appendLockTooltip already handles lock status display)
2. ILockable/IHasResistance Javadoc: update @link refs from deleted
   V1 classes to V2 AbstractV2BondageItem/DataDrivenBondageItem
3. SettingsAccessor Javadoc: remove stale BindVariant @link references
4. DataDrivenBondageItem: update NECK block comment (remove branch ref)
5. Delete empty bondage3d/gags/ directory

src/main/java/com/tiedup/remake/items/base/IHasResistance.java

@@ -22,10 +22,8 @@ import net.minecraft.world.item.ItemStack;
  *
  * <h2>Implementations</h2>
  * <ul>
- *   <li>{@link ItemBind} - Ropes, chains, straitjackets</li>
- *   <li>{@link ItemGag} - Ball gags, tape gags, cloth gags</li>
- *   <li>{@link ItemBlindfold} - Blindfolds</li>
- *   <li>{@link ItemCollar} - Collars (special: may not be struggleable)</li>
+ *   <li>{@link com.tiedup.remake.v2.bondage.items.AbstractV2BondageItem} - All V2 bondage items</li>
+ *   <li>{@link com.tiedup.remake.v2.bondage.datadriven.DataDrivenBondageItem} - Data-driven items (resistance via ResistanceComponent)</li>
  * </ul>
  *
  * <p>Based on original IHasResistance.java from 1.12.2

src/main/java/com/tiedup/remake/items/base/ILockable.java

@@ -24,11 +24,8 @@ import org.jetbrains.annotations.Nullable;
  *
  * <h2>Implementations</h2>
  * <ul>
- *   <li>{@link ItemGag} - Gags can be locked</li>
- *   <li>{@link ItemBlindfold} - Blindfolds can be locked</li>
- *   <li>{@link ItemCollar} - Collars can be locked</li>
- *   <li>{@link ItemEarplugs} - Earplugs can be locked</li>
- *   <li>ItemBind - Binds can be locked (future)</li>
+ *   <li>{@link com.tiedup.remake.v2.bondage.items.AbstractV2BondageItem} - All V2 bondage items</li>
+ *   <li>{@link com.tiedup.remake.v2.bondage.datadriven.DataDrivenBondageItem} - Data-driven items (via AbstractV2BondageItem)</li>
  * </ul>
  *
  * <h2>NBT Storage</h2>