Add packages

- Add the packages that help the operator work as expected.
- Update `go.mod` by running `go mod tidy`.

pkg/onepassword/uuid.go

@@ -0,0 +1,20 @@
+package onepassword
+
+// UUIDLength defines the required length of UUIDs
+const UUIDLength = 26
+
+// IsValidClientUUID returns true if the given client uuid is valid.
+func IsValidClientUUID(uuid string) bool {
+	if len(uuid) != UUIDLength {
+		return false
+	}
+
+	for _, c := range uuid {
+		valid := (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9')
+		if !valid {
+			return false
+		}
+	}
+
+	return true
+}