Feature request: Find in workdir

[amagnolo]

I would like to be able to search for text in the whole workdir (including subfolders), to find a keyword in a collection of documents.

Use case is a long book split in chapters, a file for each chapter, some of them in subfolders; I need to be able to find where a word is used. Clicking on the list of matching documents should open the document in the editor and position the cursor on the first matching word.

This is an example of how this is implemented in Zim (files are called "pages", while "score" is the count of how many times the keyword was found in that file):