feat: Cleans up some file names, adds generate admin user command.

Sources/App/Views/Utils/Img.swift

@@ -1,10 +1,12 @@
 import Elementary
 
 enum Img {
+  @Sendable
   static func spinner(width: Int = 30, height: Int = 30) -> some HTML<HTMLTag.img> {
     img(.src("/images/spinner.svg"), .width(width), .height(height))
   }
 
+  @Sendable
   static func search(width: Int = 30, height: Int = 30) -> some HTML<HTMLTag.img> {
     img(.src("/images/search.svg"), .width(width), .height(height))
   }