add greek sample

[jzohrab]

Regex chars:

a-zA-ZÀ-ÖØ-öø-ȳͰ-Ͽἀ-ῼ

Sample story: https://www.greek-language.gr/certification/dbs/teachers/show.html?id=5

Figure out the dictionary

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from Cynthios in slack:

Modern Greek
https://en.wiktionary.org/wiki/###
https://www.wordreference.com/gren/###
*https://www.deepl.com/translator#el/en/###

[jzohrab]

Done in the dev branch, looks good to me. :-)