feat: massive overhaul to manage costs (#103)

### Explanation

_No response_

### Issue

Closes #102

### Attestations

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- [ ] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [ ] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

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

### Style

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- [ ] My pull request uses an appropriate title, matching the conventional commit standards.
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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.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

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### Versioning

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Reviewed-on: #103
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src-tauri/src/lib.rs

@@ -3,6 +3,7 @@ mod bridge_manager;
 mod clipboard;
 mod commands;
 mod config;
+mod cost_tracking;
 mod git;
 mod notifications;
 mod quick_actions;
@@ -10,6 +11,7 @@ mod sessions;
 mod snippets;
 mod stats;
 mod temp_manager;
+mod tool_cache;
 mod tray;
 mod types;
 mod vbs_notification;
@@ -159,6 +161,14 @@ pub fn run() {
             delete_file,
             delete_directory,
             rename_path,
+            // Cost tracking commands
+            get_cost_summary,
+            get_cost_alerts,
+            set_cost_alert_thresholds,
+            export_cost_csv,
+            get_today_cost,
+            get_week_cost,
+            get_month_cost,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");