Broken cogs should be fixed or removed.

[CodeWizardClemens]

Some cogs are broken, they should either be fixed and tested, or removed.

IH

• Remove management cog
• Fix mealplan cog, or create new issue for it.
• Fix workout assistant, or create new issue for it.
• Check all cogs if they still work.

AC

• Broken cogs are removed or fixed.