🏗️(bin) merge duplicated folders scripts and bin

Few scripts were duplicated between the scripts and the bin folders.
Reorganize the scripts in a common folder, and align filenames to
follow the same rule.

bin/update-keys.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+find . -name "*.enc.*" -exec sops updatekeys -y {} \;