Add step-by-step walkthrough

Primarily the `usage-example.md` document and associated files

Author: penyuan

.reuse/dep5

@@ -4,21 +4,12 @@ Upstream-Contact: Pen-Yuan Hsing <https://github.com/penyuan/>
 Source: https://github.com/OPEN-NEXT/wp2.2_dev/
 
 Files:
-    README.md
-    EXECUTIVE_SUMMARY.md
+    docs/*
+    docs/images/*
+    docs/usage-example-images/*
     .github/ISSUE_TEMPLATE/bug_report.md
-    docs/images/dashboard_flowchart.drawio.jpg
-    docs/images/dashboard_flowchart.drawio.svg
-    docs/images/hover-plot-controls.gif
-    docs/images/mined_data.json.jpg
-    docs/images/osdash-command.jpg
-    docs/images/osdash-screenshot.jpg
-    docs/images/osdash-select-project.jpg
-    docs/images/osdash-select-repo.jpg
-    docs/images/osdash-select-timeframe.jpg
-    docs/images/OSH-repos.csv.png
-    docs/images/osmine-command.png
-    docs/images/osmine-example-run.jpg
+    EXECUTIVE_SUMMARY.md
+    README.md
 Copyright: 2021 Pen-Yuan Hsing
 License: CC-BY-SA-4.0