Move NOTES.md to delta dir

Author: rcleveng

src/delta/NOTES.md

@@ -0,0 +1,9 @@
+Available versions of the delta pager: https://github.com/dandavison/delta/releases
+Github Homepage: https://github.com/dandavison/delta
+
+## OS Support
+
+This Feature should work on recent versions of Debian/Ubuntu-based distributions with the `apt` package manager installed as well as
+Alpine with apk.
+
+`bash` is required to execute the `install.sh` script.