Add initial implementation of PlunkEmailSender and update .gitignore.

- Removed `appsettings.Development.json` and excluded it from version control.
- Updated `API.csproj` to remove unnecessary folder reference.

API/API.csproj

@@ -30,8 +30,4 @@
     <PackageReference Include="Ulid" Version="1.4.1" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Folder Include="Services\" />
-  </ItemGroup>
-
 </Project>

API/Services/PlunkEmailSender.cs

@@ -0,0 +1,11 @@
+using Microsoft.AspNetCore.Identity.UI.Services;
+
+namespace API.Services;
+
+public class PlunkEmailSender : IEmailSender
+{
+    public Task SendEmailAsync(string email, string subject, string htmlMessage)
+    {
+        throw new NotImplementedException();
+    }
+}

API/appsettings.Development.json

@@ -1,8 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  }
-}