add puzzle runner main.go

main.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"adventoc/2024"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+)
+
+func main() {
+	buf := new(bytes.Buffer)
+	tee := io.TeeReader(os.Stdin, buf)
+
+	puzzle := adventoc2024.Day2{}
+
+	fmt.Println("Part 1:", puzzle.Part1(tee))
+	fmt.Println("Part 2:", puzzle.Part2(buf))
+}