Villager Union

Fixes for Minecraft 26.2 and 26.3, on Fabric and NeoForge. Worlds from 0.3.0 load as they are.

- Speech bubbles with Essential: thin strips no longer show under the villagers' speech bubbles.
- A workstation on the counter: a brewing stand (or any workstation) standing on a counter of slabs, stairs or trapdoors now counts that counter.
- No more climbing onto the counter: the villager of such a shop stands on the floor behind the counter.
- The workstation counts for its own kind: an armorer's blast furnace now counts as its furnace, a weaponsmith's grindstone as its grindstone.
- Clearer shop tiers in the ledger: a profession's page now says what each tier needs.

Thanks to _gerostray_ for finding the shop bugs and to user_sfwletl1sm66owpu56174 for reporting the Essential issue.