Rename scripts and make messages consistent

MAILPOET-4237

mailpoet/tasks/lint-staged-css.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+source $PWD/.env
+
+if [ "$MP_GIT_HOOKS_ENABLE" != "true" ]; then
+    echo "MP_GIT_HOOKS_ENABLE is not set to 'true', skipping lint-staged-css."
+    exit 0
+fi
+
+if [ "$MP_GIT_HOOKS_STYLELINT" = "true" ]; then
+  pnpm run stylelint $@
+else
+  echo "MP_GIT_HOOKS_STYLELINT is not set to 'true', skipping stylelint."
+fi