Fix: Change module function names to be unique

The code for each module is wrapped in a function so the module
can be parameterized, and so its variables can be scoped to the
function. However, the function names must be unique, otherwise when
the modules are sourced, functions will overwrite functions with the
same name in previously sourced modules.

module/bat

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-run () {
+mod_bat () {
   # Customizable configuration constants
   local -r DEFAULT_CNT=1
   local -r DEFAULT_PRE_PLG=' '
@@ -53,5 +53,3 @@ run () {
   printf '%b' "${res:1}"
 }
 
-run "$@"
-

module/dt

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-run () {
+mod_dt () {
   # Customizable configuration constants
   local -r DEFAULT_FMT='%a %d %I:%M%p'
   local -r DEFAULT_PRE=''
@@ -13,5 +13,3 @@ run () {
   printf '%b%b%b' "${pre}" "$(date +"${fmt}")" "${suf}"
 }
 
-run "$@"
-