Add some help inside the Home tab page

[KarlHeitmann]

Same as #2 , but for src/ui/sub_search.rs file

This file will show the user a new tab where he can input a new search term, and when he hits the enter key, it will perform a new rip grep search over the list of matched files of the original search term.

The new rip grep search will call recursively the function rip_grep_wrapper, but will provide slightly different parameters to the function, and it will borrow the terminal instance. This is the power of fractals