Too many refactors in one:

- Allowed adding ephemeral(ish) views and functions
- Moved message_count to a concrete database field
- Moved most proxy logic to a stored procedure
- Moved database files around and refactored schema manager

PluralKit.Core/PluralKit.Core.csproj

@@ -33,7 +33,6 @@
     </ItemGroup>
 
     <ItemGroup>
-      <EmbeddedResource Include="Migrations\*.sql" />
+      <EmbeddedResource Include="Database/**/*.sql" />
     </ItemGroup>
-
 </Project>