Mikhail Semenov 34f66d0ad9 Rewrite autosaw fellTree with 0-1 BFS tree detection
Old approach scanned a fixed 5-direction, 10-block-high column — missed
branches, couldn't distinguish adjacent trees.

New approach:
- Scan working area for valid tree bases with plantable ground below
- 0-1 BFS from all bases using 18-connectivity to assign each
  wood/leaf block to its nearest trunk
- Only fell blocks owned by the hit tree's column
2026-02-26 07:02:30 +01:00
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