feat: add toggle functionality for journal abbreviation lists

This commit adds the ability to enable/disable specific journal abbreviation lists in JabRef, including both the built-in list and external CSV files. Users can now toggle journal abbreviation lists on/off without removing them from the configuration.

Key features: Toggle built-in journal abbreviation list, toggle individual external abbreviation lists, visual indicators for enabled/disabled states, persistence of toggle states between sessions, performance optimizations for abbreviation operations.

Closes JabRef#12468

Author: zikunz