[api-minor] Fix the way to chunk the strings (#13257)

- Improve chunking in order to fix some bugs where the spaces aren't here:
    * track the last position where a glyph has been drawn;
    * when a new glyph (first glyph in a chunk) is added then compare its position with the last saved one and add a space or break:
      - there are multiple ways to move the glyphs and to avoid to have to deal with all the different possibilities it's a way easier to just compare positions;
      - and so there is now one function (i.e. "compareWithLastPosition") where all the job is done.
  - Add some breaks in order to get lines;
  - Remove the multiple whites spaces:
    * some spaces were filled with several whites spaces and so it makes harder to find some sequences of words using the search tool;
    * other pdf readers replace spaces by one white space.

Update src/core/evaluator.js

Co-authored-by: Jonas Jenwald <[email protected]>

Co-authored-by: Jonas Jenwald <[email protected]>

Author: calixteman