feat: add Settings and Setup pages for user management

- Implemented Settings page for changing user passwords with validation and feedback.
- Created Setup page for initial admin account setup with form handling and navigation.
- Added API service layer for handling requests related to proxy hosts, remote servers, and import functionality.
- Introduced mock data for testing purposes and set up testing framework with vitest.
- Configured Tailwind CSS for styling and Vite for development and build processes.
- Added scripts for Dockerfile validation, Python syntax checking, and Sourcery integration.
- Implemented release and coverage scripts for better CI/CD practices.

backend/internal/database/database.go

@@ -0,0 +1,18 @@
+package database
+
+import (
+	"fmt"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+// Connect opens a SQLite database connection.
+func Connect(dbPath string) (*gorm.DB, error) {
+	db, err := gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
+	if err != nil {
+		return nil, fmt.Errorf("open database: %w", err)
+	}
+
+	return db, nil
+}