Extended block shapes

• Adapt to new version Blockus mod.
• Fixed the issue that vertical stairs have the incorrect tag extshape:vertical_slabs instead of extshape:vertical_stairs.
• Adjusted the way item groups are modified.
• Modified the loot table of variants of Stars Block and Nether Star Block in Blockus mod.

For 1.20.1

No changelog was specified.

• Adapted to new version of Better Runtime Resource Packs.
• Fixed the issue that some bedrock blocks occupy the empty loot table.
• The permission level of /extshape:check-conflict has been adjusted to 4.
• Fixed the issue that Blockus white oaks cannot be stripped with axe.

No changelog was specified.