Add high level API for input

modules/scala/jupyter-api/src/main/scala/almond/input/Input.scala

@@ -0,0 +1,38 @@
+package almond.input
+
+import almond.api.JupyterApi
+
+final class Input private (
+  val prompt: String,
+  val password: Boolean
+) {
+
+  private def copy(
+    prompt: String = prompt,
+    password: Boolean = password
+  ): Input =
+    new Input(prompt, password)
+
+  def withPrompt(prompt: String): Input =
+    copy(prompt = prompt)
+  def withPassword(password: Boolean): Input =
+    copy(password = password)
+  def withPassword(): Input =
+    copy(password = true)
+
+  // TODO Also allow to return result via a future?
+  def request()(implicit api: JupyterApi): String =
+    api.stdin(prompt, password)
+
+}
+
+object Input {
+  def apply(): Input =
+    new Input("", password = false)
+  def apply(prompt: String): Input =
+    new Input(prompt, password = false)
+  def password(): Input =
+    new Input("", password = true)
+  def password(prompt: String): Input =
+    new Input(prompt, password = true)
+}

modules/scala/scala-interpreter/src/main/scala/almond/AmmInterpreter.scala

@@ -22,6 +22,7 @@ object AmmInterpreter {
       |import almond.interpreter.api.DisplayData.DisplayDataSyntax
       |import almond.display._
       |import almond.display.Display.{markdown, html, latex, text, js, svg}
+      |import almond.input._
     """.stripMargin
 
   private[almond] val isAtLeast_2_12_7 = {