* feature: add EF level word list (1-6)
* feature: add EF dictionary
* fix: word formatting error
* feature: add EF level word list (7-16)
* feature: add EF level word list (7-16)
* style: Add idea file ignore
* fix: complete the lost modifications after merging.
* fix: word errors
---------
Co-authored-by: KaiyiWing <Zhang.kaiyi42@gmail.com>