* bot: add member count to system card
* bot: fix potential crash on edge case
Fixes a potential crash if a user queries the system card of a system with no members
* bot: tidy up code
* bot: move member count to embed title/Member field
Displays the member count (between parentheses) in the embed title if the system is named, otherwise shows it in the Member field title (again between parentheses)
* bot: move member count to Member field title entirely
Removed the member count from the embed title and display it in the Member field title within parentheses in all cases
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