init(11): simplest scala scaffolding

11-single-price-grid-component/.scalafmt.conf

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+version = "3.7.3"
+runner.dialect = scala3

11-single-price-grid-component/src/main/scala/pricegrid/App.scala

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+//> using dep com.lihaoyi::cask:0.9.1
+//> using dep com.lihaoyi::scalatags:0.12.0
+
+package pricegrid
+
+import scalatags.Text.all._
+import scalatags.Text.tags2
+
+object App extends cask.MainRoutes {
+  @cask.get("/")
+  def index() = doctype("html")(
+    html(
+      head(
+        tags2.title("Exercise 11")
+      ),
+      body(
+        h1("Welcome to the future")
+      )
+    )
+  )
+
+  initialize()
+}