Add mychmod[rw/ro] scripts

These scripts chmod recursively directories (775) and files (either 664
(rw) or 444 (ro)), which complies with User Private Group (UPG) scheme.
Signed-off-by: Cédric Marie <cedric@hjuvi.lautre.net>

scripts/mychmodro

+#!/bin/sh
+
+# mychmodro - chmod recursively directories 775 and files 444
+# This file is part of Painted Shell - Shell configuration and scripts.
+#
+# Written in 2019 by Cédric Marie
+#
+# To the extent possible under law, the author(s) have dedicated all copyright
+# and related and neighboring rights to this software to the public domain
+# worldwide. This software is distributed without any warranty.
+#
+# You should have received a copy of the CC0 Public Domain Dedication along
+# with this software.
+# If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+printf "Current directory: "
+pwd
+printf "Do you want to chmod 775(directories)/444(files) (y/N)? "
+read answer
+if [ "$answer" != "y" ]; then
+    exit 0
+fi
+printf "Directories...\n"
+find -type d -exec chmod 775 {} \;
+printf "Files...\n"
+find -type f -exec chmod 444 {} \;
+printf "Done\n"

scripts/mychmodrw

+#!/bin/sh
+
+# mychmodrw - chmod recursively directories 775 and files 664
+# This file is part of Painted Shell - Shell configuration and scripts.
+#
+# Written in 2019 by Cédric Marie
+#
+# To the extent possible under law, the author(s) have dedicated all copyright
+# and related and neighboring rights to this software to the public domain
+# worldwide. This software is distributed without any warranty.
+#
+# You should have received a copy of the CC0 Public Domain Dedication along
+# with this software.
+# If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+printf "Current directory: "
+pwd
+printf "Do you want to chmod 775(directories)/664(files) (y/N)? "
+read answer
+if [ "$answer" != "y" ]; then
+    exit 0
+fi
+printf "Directories...\n"
+find -type d -exec chmod 775 {} \;
+printf "Files...\n"
+find -type f -exec chmod 664 {} \;
+printf "Done\n"