* Refactor user settings to use enum for unit preferences (temperature,
network, disk).
* Update chart components to utilize new unit formatting functions
* Remove deprecated conversion functions and streamline unit handling
across charts.
* Enhance settings page to allow user selection of unit preferences with
updated labels.
- Introduce `Os` enum to represent supported operating systems.
- Update `SystemInfo` interface to include OS type.
- Refactor `ContainerChart` component to use `ChartType` enum for better clarity.
- Switched to dynamic units in container memory chart.
