sorted src, activate condition for public directory and job offers, dev parameter for local lib folder

- CSS finalised
- Default user picture added
- See https://git.happy-dev.fr/startinblox/components/sib-directory/merge_requests/6

Fixed responsive issue on counter in /members page
Had to modify some CSS files, create templates, modify data-fields in sib-display, clean up and refactor
Removed custom-widgets

Better display of filters on members and job-offers pages.

Display available data
Add styles + new icon
Refactoring

Bonus:
new widget for placeholder on sib-dropdwn + styles

Add paginate into sib-display.
Add styles to buttons and span inside the new <nav> generated.

New CSS rules added, HTML has been modified.

Closes #54