AE2 Pattern Restocker

Added

• Return-to-blank button on the Pattern Encoding Terminal: a small X badge on the encoded pattern slot converts the encoded pattern back to a blank pattern and returns it to the blank pattern slot, ME storage, or player inventory (in that priority order). Only visible when the slot contains an encoded pattern.
• Config file (`config/ae2_pattern_restocker-common.toml`) with toggles for both features (`autoRestock` and `returnButton`), both enabled by default.

Fixed

• Blank pattern extraction now correctly respects ME network security permissions; the action is attributed to the player operating the terminal rather than being anonymous
• Game no longer crashes on startup if an AE2 update causes mixin incompatibility; the mod silently disables itself instead