Blocchio - WAILA type plugin

Added Layout Editor:

• Editor now lives in a DecoratedContainer with native close button and centered Apply/Reset footer.
• Free-move positioning replaces anchor presets: X/Y sliders move the HUD anywhere, with slider ranges configurable via config.properties.
• Reset button only zeroes offsets (no anchor changes) and Apply/Reset buttons stay centered.

Config UI improvements:

• NEW badge overlay for “Layout Editor” row doesn’t shift text.

Commands & presets:

• /blocchio pos accepts all presets (top_center, bottom_center, etc.) just like the config UI.

Stability:

• Fixed disconnects when toggling HUD on from UI (UI commands no longer run before HUD attaches).