Add EMC Builder: a BuildCraft Builder that pays for materials with EMC

- TileEMCBuilder extends TileBuilder. During build() it exposes virtual
  material slots backed by EMC, then charges the EMC value (1:1) of what
  was used. Real items and tank fluids are still used first.
- EMC is stored per player per world (EmcPool, WorldSavedData), so all
  EMC Builders a player owns in a world share one balance.
- GUI based on BuildCraft's Builder GUI, with an EMC consume slot like the
  Transmutation Table's and the owner's balance shown.
- Blueprint schematic strips the owner; the first player to open an
  unowned builder becomes its owner.
- Lit top while building is not drawn.
- Shapeless recipe: Builder + Transmutation Table.
- Depend on local BuildCraft 7.1.27 and FMProjectE dev jars in libs/
  (not committed).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/resources/assets/emcbuilder/lang/en_US.lang

@@ -0,0 +1,2 @@
+tile.emcBuilder.name=EMC Builder
+gui.emcbuilder.stored=EMC: %s

src/main/resources/assets/emcbuilder/lang/ja_JP.lang

@@ -0,0 +1,2 @@
+tile.emcBuilder.name=EMCビルダー
+gui.emcbuilder.stored=EMC: %s