New Translator SORA - Search Ornithological Research Archive

closes #827 asked https://forums.zotero.org/discussion/42937/translator-suggestion-sora/
This is either a single month or a range of several months, e.g. first test case <code>"issue": "3 (May-June)"</code>. I guess in the first case one could also add the month to the <code>date</code>, but AFAIK that will not work with time ranges. The information is in the first place (the website of the past volumes of the journals) and therefore I would rather not want to delete the information completely, if possible. Other ideas how to handle months? <code>item.note</code>?