Add Support for Advance Labels ( LabelV2)

Add Support for Custom Migration to keep supporting two database( sqlite and postgres)
Migration from Label to LabelV2

internal/database/migration.go

@@ -0,0 +1,72 @@
+package database
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"donetick.com/core/config"
+	chModel "donetick.com/core/internal/chore/model"
+	cModel "donetick.com/core/internal/circle/model"
+	nModel "donetick.com/core/internal/notifier/model"
+	tModel "donetick.com/core/internal/thing/model"
+	uModel "donetick.com/core/internal/user/model" // Pure go SQLite driver, checkout https://github.com/glebarez/sqlite for details
+	migrations "donetick.com/core/migrations"
+	migrate "github.com/rubenv/sql-migrate"
+	"gorm.io/gorm"
+)
+
+func Migration(db *gorm.DB) error {
+	if err := db.AutoMigrate(uModel.User{}, chModel.Chore{},
+		chModel.ChoreHistory{},
+		cModel.Circle{},
+		cModel.UserCircle{},
+		chModel.ChoreAssignees{},
+		nModel.Notification{},
+		uModel.UserPasswordReset{},
+		tModel.Thing{},
+		tModel.ThingChore{},
+		tModel.ThingHistory{},
+		uModel.APIToken{},
+		uModel.UserNotificationTarget{},
+		chModel.Label{},
+		chModel.ChoreLabels{},
+		migrations.Migration{},
+	); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func MigrationScripts(gormDB *gorm.DB, cfg *config.Config) error {
+	migrations := &migrate.FileMigrationSource{
+		Dir: migrationDir(),
+	}
+
+	path := os.Getenv("DT_SQLITE_PATH")
+	if path == "" {
+		path = "donetick.db"
+	}
+
+	db, err := gormDB.DB()
+	if err != nil {
+		return err
+	}
+
+	n, err := migrate.Exec(db, "sqlite3", migrations, migrate.Up)
+	if err != nil {
+		return err
+	}
+	fmt.Printf("Applied %d migrations!\n", n)
+	return nil
+}
+
+func migrationDir() string {
+	_, filename, _, ok := runtime.Caller(1)
+	if !ok {
+		return ""
+	}
+	return filepath.Join(filepath.Dir(filename), "../../migrations")
+}