* Update array.md
refined some parts, some changed up a bit.
* Update array.md
edited the things that yanedie has mentioned (not including the final review).
I will simplify a bit in the next commit (I'll try make a balance).
thank you so much for the review Yanedie!
* Update array.md
done the all the parts that Yanedie has suggested.
please check if this version is alright, or is the previous version is better?
thanks and happy new year!
* Update array.md
changed the things that Phoenix has commented.
* Add the translation of the data structure chapter. Synchronize the headings in mkdocs-en.yml
* Fix a typo
* Add the translation of the array and linked-list chapter