Full text search

[liuyun16]

It seems the Viki only support to search the title, is it possible to enable the function of the full-text search?

[tamlok]

Since it is running fully in browser, I think we can fetch all the files one by one to do a full text search and cache the fetched content locally for future search.

Sorry that I do not have time for this. PR is appreciated!

Thanks!