refactor: massive refactor to have only one binary to call

Makefile

@@ -0,0 +1,13 @@
+GO = go
+BIN = bin/aoc
+
+.PHONY: build test clean
+
+build:
+	$(GO) build -o $(BIN) ./cmd/aoc
+
+test:
+	$(GO) test ./...
+
+clean:
+	rm -f $(BIN)