[EL] Support "βλ" template

[chopinesque]

• Wiktionary page: https://el.wiktionary.org/w/index.php?title=%CE%BC%CE%AD%CE%BD%CF%89_%CE%AC%CE%B3%CE%B1%CE%BB%CE%BC%CE%B1&action=edit
• Model link: https://el.wiktionary.org/wiki/%CE%A0%CF%81%CF%8C%CF%84%CF%85%CF%80%CE%BF:%CE%B2%CE%BB

For example this: {βλ|μένω}} expands to δείτε τη λέξη μένω (see the word μένω)