Common Mishnah domains

The Mishnah's vocabulary changes dramatically by tractate, but several domains recur: land and courtyards, vessels, animals, agricultural produce, tithes, damages, guardians, and agency. This module supplies a cross-tractate seed vocabulary — בית, שדה, חצר, כלי, בהמה, פירות, תרומה, מעשר, נזק, שור, בור, אש, שומר, שליח — so later readers can focus on the law instead of repeatedly stopping on ordinary domain nouns.