feat: add configurable AE2 objects

[SirEdvin]

Summary

• expose direct configuration APIs for ME Interfaces and Pattern Providers
• add cable getSide objects for configurable AE2 multipart devices
• support validated stock, filters, settings, priorities, upgrades, emitters, and encoded-pattern transfers
• normalize fluid amounts across loaders and update Fabric AE2 to 15.0.7-beta
• add typed contracts, OpenSpec artifacts, and cross-loader GameTest coverage

Testing

• ./gradlew :typescript-tests:compileTestLua --no-daemon
• xvfb-run -a ./gradlew :fabric:runPeripheralWorksGameTest --no-daemon (27/27)
• xvfb-run -a ./gradlew :forge:runGameTestServer --no-daemon (27/27)
• ./gradlew build --no-daemon
• openspec validate add-ae2-configurable-objects --strict --json