feat: wip on day 12 part 1

cmd/12/main_test.go

@@ -0,0 +1,17 @@
+package main_test
+
+import (
+	"testing"
+
+	solution "github.com/StevanFreeborn/advent-of-code-2025/cmd/12"
+)
+
+func TestSolvePartOne(t *testing.T) {
+	expected := -1
+
+	result := solution.SolvePartOne("EXAMPLE.txt")
+
+	if result != expected {
+		t.Errorf("got %d but wanted %d", result, expected)
+	}
+}