Speed up furnace external test by fast-forwarding CookTime

[u9g]

The furnace external test spent ~10s per version waiting out a real 200-tick smelt (getStackCookTime is a hardcoded 200 with no gamerule or recipe hook, all the way back to 1.8.8), making it the second-slowest test in the suite (~12.4s).

This keeps the test end-to-end but skips the idle ticks: after the existing assertions that a real smelt is in progress (0 < progress < 1), it merges CookTime:195s into the furnace's block entity and waits on the furnace window's update event until the output slot populates, replacing the wait(progressSeconds * 1000 + 500) sleep. Both /blockdata and /data merge block merge into existing NBT, so the loaded input/fuel are untouched, and the output is still produced by the vanilla tick() → craftRecipe() path — input decremented, fuel consumed — so every assertion is unchanged.

Version details, verified empirically against real servers on all 28 tested versions:

• Completion checks cookTime == totalCookTime exactly (not >=), so the merged value must stay below 200 — overshooting would cook forever.
• /blockdata became /data merge block in 1.13, and CookTime was renamed cooking_time_spent in 1.21.4 (1.21.3 still accepts CookTime; 1.21.4 does not).
• On 1.21.4+ the placement step needs health: send player_loaded on spawn so 1.21.4+ servers accept interactions immediately #3986 or fix: send player loaded before spawn on 1.21.4+ #3960 (send player loaded before spawn); without it the test fails at placeBlock on master today, with or without this change.

The remaining 5 ticks complete in 250–320ms on every tested version, so the await uses a tight 500ms timeout as a guard: if a future version renames the field or command again, the merge is silently ignored and the test fails fast instead of sitting out the real 10s smelt.

Timing across the matrix: ~12s → ~3s per version (the cook await itself is 249–319ms on all 28 versions), roughly 4.5 minutes saved per full-matrix run.

[rom1504]

CI fails

[u9g]

Switched to bot.supportFeature — the version boundaries now live in minecraft-data as hasDataCommand (1.13+) and furnaceNbtUsesSnakeCase (1.21.4+): PrismarineJS/minecraft-data#1260. CI here will fail until that lands and the minecraft-data dep is bumped (unknown features resolve to false, which falls through to /blockdata on 1.13+).

[github-actions]

Tests more than 1.5x slower than master (durations are noisy, so this is informational):

   8820ms ->   14764ms  mineflayer_external 1.16.5v nether