Create new random movie vote

[J4YB3]

Description

As a User I want to create a new random movie vote so that all users can vote on which movie to watch next

Acceptance Criteria

• [x] Only one explicitly created movie vote can exist in the bot (normal votes should not be limited, that also means a user that already owns a vote can create the random movie vote additionally)
• [x] Selects max 10 movies from the watch list randomly (limited by other command (#34))
• [x] Creates the vote with the random movies

[J4YB3]

Idea for adding the functionality of #36

1. Iterate over watch list and collect the three (or n) movies that have the oldest add date
2. Each time a random movie is chosen for the vote, "roll the dice" to swap the chosen movie with the one with the oldest add date
3. If the one with the oldest add date got chosen, remove it from the "oldest add date" vector and continue with step 2

• [ ] make sure, that actually the oldest gets chosen from the vector in step 2. If this is not the case, the oldest movie has the same probability as before