Add more Lead block variants

[Qwerty97475]

Describe the feature you have in mind.

Give these Blocks Lead variants:

• Chain (Copper and Iron Chains exist in Vanilla)
• Pressure Plate (Iron and Gold Chains exist in Vanilla, Lead Pressure Plates could activate after a few seconds of standing on them like Lead Doors)
• Button (Vanilla doesn't add metal buttons but many mods like Quark do, Lead Buttons could work like Lead Pressure Plates)
• Gate (for Supplementaries compat, or they could add it on their side)

Also add Lead Brick Stairs and Slabs for consistency with Copper please!

Does this solve a particular problem?

More consistent with other metals

[CreaterIDK634]

What about Lead Plaque for Supplementaries Squared Compat?

[Qwerty97475]

That's also a good idea