feat: stats and achievements (#45)

### Explanation

_No response_

### Issue

Closes #39

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### Dependencies

- [ ] I have pinned the dependencies to a specific patch version.

### Style

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### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
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### Documentation

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Reviewed-on: #45
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src-tauri/src/lib.rs

@@ -1,6 +1,8 @@
+mod achievements;
 mod commands;
 mod config;
 mod notifications;
+mod stats;
 mod types;
 mod wsl_bridge;
 mod wsl_notifications;
@@ -10,6 +12,7 @@ mod windows_toast;
 use commands::*;
 use notifications::*;
 use wsl_bridge::create_shared_bridge;
+use commands::load_saved_achievements;
 use wsl_notifications::*;
 use vbs_notification::*;
 use windows_toast::*;
@@ -35,6 +38,8 @@ pub fn run() {
             select_wsl_directory,
             get_config,
             save_config,
+            get_usage_stats,
+            load_saved_achievements,
             send_windows_notification,
             send_simple_notification,
             send_windows_toast,