Enable Privacy Policy setting in Settings screen

[Noro18]

Description

The "Privacy Policy" setting should display the app privacy policy to users. Currently commented out — the bottom sheet exists but content needs review.

File: `app/src/main/java/com/example/ordermanagementcake/ui/settings/SettingsScreen.kt` (lines 127-129)

Expected Behavior

Users can tap "Privacy Policy" to view the full privacy policy text in a bottom sheet.

Implementation

1. Uncomment the `SettingsItem("Privacy Policy", ...)` entry in `supportItems`.
2. Review and update `PrivacyPolicySheet` with complete, accurate privacy policy content covering:
   • What data is collected (orders, client info, etc.)
   • How data is stored (local Room database only, no cloud sync)
   • Data sharing policy (no third-party sharing)
   • User rights (export, delete data)
   • Contact information for questions
3. Format the policy text with proper headings, bullet points, and readable typography.
4. Consider adding a "Last updated" date at the top of the policy.
5. Optionally add a link to a hosted version if one exists.

Additional Context

• `PrivacyPolicySheet` exists at `app/src/main/java/com/example/ordermanagementcake/ui/setting_options/PrivacyPolicySheet.kt` — review and update the content.
• This app appears to store data locally only — the policy should reflect that.