v2.0.1: Format balance score to whole number

The balance score displayed in `BalanceFragment` is now formatted to show as a whole number instead of a decimal. This is achieved by changing the format specifier in `String.format` from `%.1f` to `%.0f`.

Additionally, the `@SuppressLint("UnsafeRepeatOnLifecycleDetector")` annotation has been added to the `onViewCreated` method.

v2.0.0: Update README.md with stand time and balance features

The README.md was updated to include:
- Monitoring and recording of daily stand time.
- Real-time balance assessment.

The testing instructions were also slightly modified.

v1.0.1: Refactor tree progression and update UI elements

This commit introduces the following changes:

- Refactored the tree progression logic in `ProgressFragment` and `StatsChartFragment` to use percentage-based progress and updated tree images.
- Added new tree images (cover, part_1 to part_8).
- Updated the daily goal to 10,000 steps in settings and related UI elements.
- Adjusted the step increment in `ForestFragment` to 500.
- Added an ImageView for the tree in `fragment_stats_chart.xml`.
- Updated Chinese translations for "tree" to "书".
- Updated the demo media in `README.md`.
- Added `goal` to `StatsDetailsState` and updated `StatsDetailsViewModel` accordingly.

v1.0.0: Fix string name and update README link

The string `step_count` was renamed to `step_count_title` in `app/src/main/res/values-zh/strings.xml`.
The link in `README.md` was updated to point to the correct releases page.