chore: bootstrap CHFS NG workspace

chfs-ng/internal/auth/auth.go

@@ -0,0 +1,19 @@
+package auth
+
+type PermMask uint8
+
+const (
+	None PermMask = 0
+	Read PermMask = 1 << iota
+	Write
+	Delete
+)
+
+func (p PermMask) HasRead() bool   { return p&Read != 0 }
+func (p PermMask) HasWrite() bool  { return p&Write != 0 }
+func (p PermMask) HasDelete() bool { return p&Delete != 0 }
+
+type Account struct {
+	Username, Password string
+	Mask               PermMask
+}