migrate orion repo into monorepo structure

go/internal/particle/errors.go

@@ -0,0 +1,19 @@
+package particle
+
+import "errors"
+
+var (
+	ErrNotFound            = errors.New("particle not found")
+	ErrAccessDenied        = errors.New("access denied")
+	ErrCapacityExceeded    = errors.New("open stream capacity exceeded")
+	ErrInvalidParent       = errors.New("invalid parent particle")
+	ErrInvalidType         = errors.New("invalid particle type")
+	ErrInvalidData         = errors.New("invalid particle data")
+	ErrNotAStream          = errors.New("particle is not a stream")
+	ErrStreamAlreadyOpen   = errors.New("stream is already open")
+	ErrStreamAlreadyClosed = errors.New("stream is already closed")
+	ErrAccessExpansion     = errors.New("cannot expand access beyond parent")
+	ErrMembersRequired     = errors.New("custom visibility requires at least one member")
+	ErrInheritedAtRoot     = errors.New("root particles cannot use inherited visibility")
+	ErrNotAContainer       = errors.New("only streams can have members")
+)