added method body and comments, as well as added getter and setter methods for taskList
nothing significant
Merge branch 'master' into branch_chunhui

Conflicts:
	CEO/src/cs2103/CommandExecutor.java
added string templates for help
Merge remote-tracking branch 'main/branch_chunhui'

Conflicts:
	CEO/src/cs2103/CommandExecutor.java
	CEO/src/cs2103/ResponseParser.java