Add Russian language (ru.json)

[ApollieKastro]

No description provided.

[ApollieKastro]

Why did the test fail? What could be the Reason

[amnweb]

assert not {'common_cleanup_css', 'common_config_path', 'common_continue_anyway', 'common_copy', 'common_cut', 'common_fix_indentation', ...}
FAILED tests/test_locales.py::TestLocaleCompleteness::test_all_locales_have_same_number_of_keys - AssertionError: The following locales have different number of keys:
    - ru.json: 163 keys (expected 260)
assert not ['ru.json: 163 keys (expected 260)']

Missing many keys, it must be same as EN.