Add configuration file support

config.toml

@@ -0,0 +1,29 @@
+# Work Time Calculator configuration file
+# This is the default configuration.
+# You can only partially override the config,
+# any missing values will use the defaults described here.
+# You can place your configuration file in $XDG_CONFIG_HOME/wtc/config.toml,
+# usually ~/.config/wtc/config.toml
+
+# This section is for default values for inputs
+[defaults]
+# Leave empty if you don't have an unpaid lunch break
+# or if you normally log your lunch break hours
+lunchBreakDuration = "00:30"
+# Your work day duration
+workDayDuration = "07:30"
+# The time you start working
+startTime = "08:00"
+# The time you stop working. Can either be "now" or a time
+stopTime = "now"
+
+# This section can be used to disable prompts for each
+# of the questions. The default value will be used automatically
+# if the setting is set to false
+[askInput]
+workDayDuration = true
+startTime = true
+stopTime = true
+logged = true
+# It is assumed that you didn't have lunch if this is false
+hadLunch = true