feat: basic wrapper + days 1 to 3

src/main/scala/days/Day.scala

@@ -0,0 +1,31 @@
+package days
+
+import scala.io.Source
+
+trait Day {
+  val number: Int
+
+  def getInput(): Option[String] = {
+    val resourcePath = getClass.getResource(s"day${number}.txt")
+    if (resourcePath != null) {
+      Some(Source.fromURL(resourcePath).mkString)
+    } else {
+      None
+    }
+  }
+
+  def solve(): Unit = {
+    getInput() match {
+      case Some(input) => {
+        println(s"Day: $number")
+        println(s"Part 1: ${part1(input)}")
+        println(s"Part 2: ${part2(input)}")
+      }
+      case None =>
+        println(s"Missing day $number input")
+    }
+  }
+
+  def part1(input: String): String
+  def part2(input: String): String
+}