Description

Added comprehensive time tracking functionality to track time spent on tasks and compare against estimates.

Changes

• Added --estimate flag to add command for setting time estimates (e.g., 2h, 30m, 1h30m)
• Added start command to begin time tracking on a task
• Added stop command to end time tracking and log duration
• Added status command to view timer status for tasks
• Added timereport command with weekly/monthly/all-time views
• Enhanced stats command to show time tracking metrics
• Updated data models to store estimate, time_spent, started_at, and time_logs

Testing

Tested with:

tix add "Write docs" -e 2h
tix start 1
# waited...
tix stop 1
tix stats
tix timereport