feat: Initialize VitePress documentation system with multi-language content, custom theme, and assets.

docs/manual/settings/system.md

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+# System Settings
+
+Manage your MIVO administrator account and global application behavior.
+
+## <Icon name="UserCheck" color="primary" /> Admin Account
+
+Change your MIVO administrator credentials to ensure system security.
+- **Username**: The name used for login.
+- **Password**: Secure password for access.
+
+## <Icon name="Globe" color="info" /> Global Config
+
+Adjust the environment settings for the entire application:
+- **Language**: Choose your preferred interface language (English/Indonesian).
+- **Timezone**: Set the local time for accurate reports and logs.
+- **Currency**: Define the currency symbol used in vouchers and reports.
+
+## <Icon name="ShieldAlert" color="warning" /> Security
+
+MIVO uses session-based authentication. Ensure you log out when using public terminals.