docs: add comprehensive static daily reminders documentation

- Add static daily reminders to README.md core features and API reference
- Create detailed usage guide in USAGE.md with examples and best practices
- Add version 2.1.0 changelog entry documenting new reminder functionality
- Create examples/static-daily-reminders.ts with complete usage examples
- Update test-apps README to include reminder testing capabilities

The static daily reminder feature provides simple daily notifications
without network content dependency, supporting cross-platform scheduling
with rich customization options.

tests/advanced-scenarios.test.ts

@@ -56,6 +56,12 @@ describe('DailyNotification Advanced Scenarios', () => {
       refreshAuthenticationForNewIdentity: jest.fn(),
       clearCacheForNewIdentity: jest.fn(),
       updateBackgroundTaskIdentity: jest.fn(),
+
+      // Static Daily Reminder Methods
+      scheduleDailyReminder: jest.fn(),
+      cancelDailyReminder: jest.fn(),
+      getScheduledReminders: jest.fn(),
+      updateDailyReminder: jest.fn(),
     };
     plugin = new DailyNotification(mockPlugin);
   });

tests/daily-notification.test.ts

@@ -70,6 +70,12 @@ describe('DailyNotification Plugin', () => {
       refreshAuthenticationForNewIdentity: jest.fn(),
       clearCacheForNewIdentity: jest.fn(),
       updateBackgroundTaskIdentity: jest.fn(),
+
+      // Static Daily Reminder Methods
+      scheduleDailyReminder: jest.fn(),
+      cancelDailyReminder: jest.fn(),
+      getScheduledReminders: jest.fn(),
+      updateDailyReminder: jest.fn(),
     };
 
     // Create plugin instance with mock

tests/edge-cases.test.ts

@@ -61,6 +61,12 @@ describe('DailyNotification Edge Cases', () => {
       refreshAuthenticationForNewIdentity: jest.fn(),
       clearCacheForNewIdentity: jest.fn(),
       updateBackgroundTaskIdentity: jest.fn(),
+
+      // Static Daily Reminder Methods
+      scheduleDailyReminder: jest.fn(),
+      cancelDailyReminder: jest.fn(),
+      getScheduledReminders: jest.fn(),
+      updateDailyReminder: jest.fn(),
     };
     plugin = new DailyNotification(mockPlugin);
   });

tests/enterprise-scenarios.test.ts

@@ -60,6 +60,12 @@ describe('DailyNotification Enterprise Scenarios', () => {
       refreshAuthenticationForNewIdentity: jest.fn(),
       clearCacheForNewIdentity: jest.fn(),
       updateBackgroundTaskIdentity: jest.fn(),
+
+      // Static Daily Reminder Methods
+      scheduleDailyReminder: jest.fn(),
+      cancelDailyReminder: jest.fn(),
+      getScheduledReminders: jest.fn(),
+      updateDailyReminder: jest.fn(),
     };
     plugin = new DailyNotification(mockPlugin);
   });