This commit introduces the commodity price prediction feature, including:
- **Data Layer:**
- Models for commodity prediction and price responses.
- `CommodityApiService` for fetching data from the backend.
- `CommodityRepository` to abstract data fetching logic.
- **DI Modules:**
- `appModule` for providing `CommodityRepository`.
- `networkModule` for setting up Retrofit and OkHttp.
- `viewModelModule` for providing `PredictionViewModel` and `CommodityViewModel`.
- **Presentation Layer:**
- `PredictionViewModel` and `CommodityViewModel` to handle business logic and expose data to UI.
- `PredictionScreen` to display commodity price predictions with a dropdown to select commodities and detailed breakdown of future prices (tomorrow, next week, next month, next 3 months).
- `CommodityPriceScreen` (initial setup, details to be implemented) to display current commodity prices.
- `CommodityListItem` composable for displaying individual commodity price information.
- `FeatureBanner` composable for both commodity price prediction and control features.
- **Navigation:**
- `SetupNavigation` to define navigation routes for `CommodityPriceScreen` and `PredictionScreen`.
- **Core Utilities:**
- `toRupiahFormat()` extension function to format numbers as Indonesian Rupiah.
- `percentageChange()` function to calculate percentage difference.
