feat: Add necessary db models

internal/models/db/note.go

@@ -0,0 +1,9 @@
+package db
+
+// Note represents user note
+type Note struct {
+	NoteID      string
+	NoteTitle   string
+	NoteAuthor  string
+	NoteContent string
+}

internal/models/db/todo.go

@@ -0,0 +1,10 @@
+package db
+
+// Todo represents TODO-list note
+type Todo struct {
+	TodoID        string
+	TodoTitle     string
+	TodoUnchecked []string
+	TodoChecked   []string
+	TodoAuthor    string
+}

internal/models/db/user.go

@@ -0,0 +1,8 @@
+package db
+
+// User represents entity that interacts with the system
+type User struct {
+	UserID   string
+	UserName string
+	Password string
+}