Issue 340 Publish Communalytic lesson (#341)

* Create guide-collecting-posts-communalytic.md

* create language files for lesson

* Update guide-collecting-posts-communalytic.md

* rename folder

* rename avatar filename

* Update guide-collecting-posts-communalytic.md

* remove netlytic image files

* add communalytic image files

* Update guide-collecting-posts-communalytic.fr.md

* Update guide-collecting-posts-communalytic.de.md

* delete netlytic lesson files

* Update guide-collecting-posts-communalytic.md

* add intro

* fix yaml

* fix unit_id parameter name in YAML front matter of the new lesson

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Co-authored-by: Daniele Guido <1181642+danieleguido@users.noreply.github.com>

Author: spapastamkou