Feat: Rename module directory to mod

This is a breaking change so this will be a new major version.

README.md

@@ -101,7 +101,7 @@ replaced with underscores. For instance, if your module file is called
 `weather-wttr`, it should contain a function called `mod_weather_wttr`. This
 function should print to stdout whatever you want to appear in its section
 of the status bar (so it should be concise with no newline characters). Then
-place your script in the `module` directory.
+place your script in the `mod` directory.
 
 To include your module output in the status bar, start the daemon with
 the module list parameter and include the name of your script in the

avdd

@@ -43,7 +43,7 @@ DEFAULT_PRE=' '
 DEFAULT_SEP_L='| '
 DEFAULT_SEP_R=' '
 DEFAULT_SUF=' '
-MOD_DIR="$(dirname "$0")"/module
+MOD_DIR="$(dirname "$0")"/mod
 ACTION_DIR=/tmp/avdd
 ACTION_DIR_LEN=${#ACTION_DIR}