Bash file to get full folder items path list (UPDATED)

General information for the business: Consulting company
Description of requirements/functionality: We have a folder with many sub folders with one or many documents inside:

Folder1
- doc F1-1.png
-doc F1-2.doc
- doc F1-3.jpg
- doc F1-4.xls

Folder2
- doc F2-1.doc
-doc F2-2.jpg
doc F2-3.doc

The goal is to get the relative path of each file concatenated per folder.
***UPDATE From our last client's request : We need to separate image files from others files ***

What we need is to get a csv file with the following data:

Folder Title ; document_path; image path;
Folder1;Folder1/doc F1-2.doc | Folder1/doc F1-4.doc ; Folder1/doc F1-1.png | Folder1/doc F1-3.jpg ;
Folder2; Folder2/doc F2-1.doc | Folder2/doc F2-3.doc ; Folder2/doc F2-2.jpg ;

OS requirements: Linux
Extra notes: This job is Urgent, so we'll prioritize the best reactivity