feat(reporting): implement timezone support in reporting allocation and related components

- Added timezone handling in the getMemberTimeSheets method to ensure accurate date calculations based on user timezone.
- Created ReportingControllerBaseWithTimezone to centralize timezone-related logic for reporting.
- Introduced a migration to add a timezone column to the users table for better user experience.
- Updated frontend API services and hooks to include user's timezone in requests.
- Enhanced members time reports page to display time logs in the user's local timezone.

worklenz-backend/src/migrations/add_user_timezone.sql

@@ -0,0 +1,8 @@
+-- Add timezone column to users table
+ALTER TABLE users ADD COLUMN IF NOT EXISTS timezone VARCHAR(50) DEFAULT 'UTC';
+
+-- Add index for better query performance
+CREATE INDEX IF NOT EXISTS idx_users_timezone ON users(timezone);
+
+-- Update existing users to use their browser timezone (this would be done via application logic)
+COMMENT ON COLUMN users.timezone IS 'IANA timezone identifier (e.g., America/New_York, Asia/Tokyo)';