Add an example for handling events manually

[davesmith00000]

For instance, if you want to just handle the raw JS event for whatever reason.

E.g.:

diff --git a/sandbox-zio/src/main/scala/example/SandboxZIO.scala b/sandbox-zio/src/main/scala/example/SandboxZIO.scala
index 772bdab..94f36b5 100644
--- a/sandbox-zio/src/main/scala/example/SandboxZIO.scala
+++ b/sandbox-zio/src/main/scala/example/SandboxZIO.scala
@@ -1,5 +1,6 @@
 package example

+import org.scalajs.dom.KeyboardEvent
 import tyrian.*
 import tyrian.Html.*
 import tyrian.cmds.Logger
@@ -69,6 +70,26 @@ object SandboxZIO extends TyrianZIOApp[Msg, Model]:
         a(href := "http://tyrian.indigoengine.io/")("Tyrian website")
       ),
       div(
+        input(
+          placeholder := "Hello",
+          onKeyPress((e: KeyboardEvent) =>Msg.CustomEventKeyIsDown(e.key))
+            .noPreventDefault.noStopImmediatePropagation.noStopPropagation,
+          onKeyUp((e: KeyboardEvent) => Msg.CustomEventKeyReleased(e.key)),
+          Event(
+            "keypress",
+            e =>
+              e match {
+                case e: org.scalajs.dom.KeyboardEvent =>
+                  println("e: " + e.key)
+                  Msg.NoOp
+
+                case _ =>
+                  // Shouldn't get here.
+                  println("e: " + e)
+                  Msg.NoOp
+              }
+          )
+        ),
         input(placeholder := "Text to reverse", onInput(s => Msg.NewContent(s)), myStyle),
         div(myStyle)(text(model.field.reverse))
       ),
@@ -95,6 +116,8 @@ enum Msg:
   case NewRandomInt(i: Int)
   case FollowLink(href: String)
   case NoOp
+  case CustomEventKeyIsDown(key: String)
+  case CustomEventKeyReleased(key: String)

 object Counter: