Java 26.3 data: block data checked against server dig results

Built from the tested support/java-26.3 wrapper (1be0552) and its pinned data submodule (minecraft-data bad5bb4). Adds to data-5: block hardness and registry names for 1.8 - 1.12 (huge mushroom blocks, lily pad, purpur stairs, grass path, fence gates, observer, unbreakable gateways/command/structure blocks, silver_shulker_box and silver_glazed_terracotta), wooden slab and conduit materials (1.13 - 1.16), 1.18 flower, azalea leaves and conduit tools, and the hardness of 79 1.18 blocks with copied properties. Each was found where a vanilla server refused or delayed a dig and checked against the server's block registrations or mineable tags.

SHA-256: b4ab2360e136a90904c2f1a44ec93143a8da45d82bf912875b021ec2923dc113
npm integrity: sha512-MVCPJPCqiiphy20GYLIQw//PUzay9ipycOBKRGJ6etyKHQxF6tGCbAXma7dykLhum1IKk0pyabUn4fC7hR2ArA==