Technical Toolbox 0.0.3-alpha for 1.21.11

New

• /server_manager - primarily designed for CMPs and rapid testing
• featureGenerateEmptyChunks config option - when true, new chunks are set to air, with structure bounding boxes preserved

Changed

• /alias - support inline eval of commands
• /alias - support negative numbers
• /alias - add ifexec to test for command success
• /alias - silent fail mode
• /alias - improve serialization