Add a new .editorconfig and reformat code (#76)

*I'll start working on features and bugfixes after this PR, I promise*
very short summary:
- no more braceless statements
- braces are on new lines now
- `sealed` on everything that can be `sealed`
- no more awkwardly looking alignment of fields/parameters
- no more `Service` suffix on service fields. yeah.
- no more `else`s. who needs them?
- code style is now enforced by CI

---------

Signed-off-by: Octol1ttle <l1ttleofficial@outlook.com>

src/Data/MemberData.cs

@@ -3,14 +3,16 @@ namespace Boyfriend.Data;
 /// <summary>
 ///     Stores information about a member
 /// </summary>
-public class MemberData {
-    public MemberData(ulong id, DateTimeOffset? bannedUntil) {
+public sealed class MemberData
+{
+    public MemberData(ulong id, DateTimeOffset? bannedUntil)
+    {
         Id = id;
         BannedUntil = bannedUntil;
     }
 
-    public ulong           Id          { get; }
+    public ulong Id { get; }
     public DateTimeOffset? BannedUntil { get; set; }
-    public List<ulong>     Roles       { get; set; } = new();
-    public List<Reminder>  Reminders   { get; }      = new();
+    public List<ulong> Roles { get; set; } = new();
+    public List<Reminder> Reminders { get; } = new();
 }