refactor: 💡 add text text-align: right style

Author: ccn-takayama-daisuke

src/scss/atomic-package/parts/_paragraph.scss

@@ -32,6 +32,9 @@
   &.center {
     text-align: center;
   }
+  &.right {
+    text-align: right;
+  }
   &.strong {
     font-weight: bold;
   }