feat: include 2015D7

cmd/aoc/main.go

@@ -1,17 +1,19 @@
 package main
 
 import (
-	"advent-of-code/internal/registry"
 	"fmt"
 	"log"
 	"os"
 	"path/filepath"
 	"regexp"
 
+	"advent-of-code/internal/registry"
+
 	// 2015
 	_ "advent-of-code/internal/2015/DayFive"
 	_ "advent-of-code/internal/2015/DayFour"
 	_ "advent-of-code/internal/2015/DayOne"
+	_ "advent-of-code/internal/2015/DaySeven"
 	_ "advent-of-code/internal/2015/DaySix"
 	_ "advent-of-code/internal/2015/DayThree"
 	_ "advent-of-code/internal/2015/DayTwo"