Core contributor profiles

As discussed in the dev meeting last week, every core contributor should get a small profile on the AlekSIS website. It shall contain:

A friendly portrait photo (good lighting, friendly expression, casual)
A role title
One paragraph about involvement and favourite topics in AlekSIS development
One paragraph about one's involvement or itnerests in (FOSS) development in general

@hansegucker Can you please drive this forward for the group surrounding you?

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