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/ScheduledEventData.cs

@@ -6,12 +6,14 @@ namespace Boyfriend.Data;
 ///     Stores information about scheduled events. This information is not provided by the Discord API.
 /// </summary>
 /// <remarks>This information is stored on disk as a JSON file.</remarks>
-public class ScheduledEventData {
-    public ScheduledEventData(GuildScheduledEventStatus status) {
+public sealed class ScheduledEventData
+{
+    public ScheduledEventData(GuildScheduledEventStatus status)
+    {
         Status = status;
     }
 
-    public bool                      EarlyNotificationSent { get; set; }
-    public DateTimeOffset?           ActualStartTime       { get; set; }
-    public GuildScheduledEventStatus Status                { get; set; }
+    public bool EarlyNotificationSent { get; set; }
+    public DateTimeOffset? ActualStartTime { get; set; }
+    public GuildScheduledEventStatus Status { get; set; }
 }