Update cheatsheets

tldr/timew

@@ -8,22 +8,30 @@ source: https://github.com/tldr-pages/tldr.git
 > A time tracking tool used to measure the duration of activities.
 > More information: <https://timewarrior.net/docs>.
 
-- Start a new stopwatch, giving a tag name to the activity being tracked:
+- Start tracking an activity:
+
+`timew start`
+
+- Tag the current activity:
+
+`timew tag {{activity_tag}}`
+
+- Start tracking and tag a new activity:
 
 `timew start {{activity_tag}}`
 
-- View running stopwatches:
-
-`timew`
-
-- Stop the stopwatch with a given tag name:
-
-`timew stop {{activity_tag}}`
-
-- Stop all running stopwatches:
+- Stop the current activity:
 
 `timew stop`
 
-- View tracked items:
+- Track an activity in the past:
+
+`timew track {{start_time} - {{end_time}} {{activity_tag}}`
+
+- View tracked items of the day:
 
 `timew summary`
+
+- View report for the last day, week, current month, etc.:
+
+`timew summary :{{today|yesterday|week|lastweek|month|lastmonth|year|lastyear}}`