add a simple script to insert lines to *.ts files

utils/insert_ru_entries.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+CWD="$(cd "$(dirname "${BASH_SOURCE[0]}")"/.. && pwd)"
+
+cat $CWD/src/shared/utils/date.ts | \
+    sed '/^  pl,/a\ \ ru,' | \
+    sed '/^  pl_PL: pl,/a\ \ ru_RU: ru,' \
+    > $CWD/shared/utils/date.ts
+
+cat $CWD/src/shared/i18n/index.ts | \
+    sed '/^export const languageOptions = \[/a\ \ {\n    label: "Русский (Russian)",\n    value: "ru_RU",\n  },' \
+    > $CWD/shared/i18n/index.ts