Added and applied styles for private readonly fields, private fields to Extensions and Common folders.

- Some renamings and code cleanups
- Chained method calls, binary expressions and binary patterns will now break into newlines
- Type param constraints and base constructor calls will be on the new line

src/NadekoBot/Db/Extensions/DbExtensions.cs

@@ -5,6 +5,7 @@ namespace NadekoBot.Db;
 
 public static class DbExtensions
 {
-    public static T GetById<T>(this DbSet<T> set, int id) where T: DbEntity
+    public static T GetById<T>(this DbSet<T> set, int id)
+        where T : DbEntity
         => set.FirstOrDefault(x => x.Id == id);
 }