Feat: Notes (Non-Linked Comments) (#52)

Adds support for notes. These are comments that are not linked to specific lines of code in the MR.

cmd/utils.go

@@ -0,0 +1,10 @@
+package main
+
+func Contains[T comparable](elems []T, v T) int {
+	for i, s := range elems {
+		if v == s {
+			return i
+		}
+	}
+	return -1
+}