tests: Move most static functions to companion object

jvm/src/test/scala/cs214/webapp/ServerSuite.scala

@@ -19,7 +19,7 @@ given unsafeURI: Conversion[String, Uri] with
 case class WebServerInfo(uri: String):
   override def toString = uri
 
-class ServerSuite extends munit.FunSuite:
+object ServerSuite:
   type Ping = String
   type Pong = String
   type State = String
@@ -62,7 +62,9 @@ class ServerSuite extends munit.FunSuite:
     println(f"Elapsed: ${(end - start) / 1000000} ms")
     result
 
+class ServerSuite extends munit.FunSuite:
   import sttp.client4.quick.*
+  import ServerSuite.*
 
   test("The main and app-selection pages respond to requests"):
     withServer: ws ?=>