feat(custom): add logic to load modules form custom, status and window so that the user cand define it's own modules or override any existing one

custom/README.md

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+# User defined modules
+
+## Description 
+
+This folder is used to store user defined modules.
+You can use this folder to add a new module or override any existing module.
+To override an existing module, make sure you use the same name for your module as the module you want to override.
+You can also override the window module for current and default window.
+
+## Create a new module
+
+Use the [Module template](#module-template) (or example.sh) as a starting point when creating a new module.
+Save the new module under this folder using the module name as the file name and .sh as the extension.
+Update the status module list with your module.
+```sh
+set -g @catppuccin_status_modules "... <module_name> ..."
+
+```
+
+## Module template
+
+show_<module_name>() { # save this module in a file with the name <module_name>.sh
+  local index=$1 # this variable is used by the module loader in order to know the position of this module 
+  local icon="$(get_tmux_option "@catppuccin_<module_name>_icon" "<Use an icon from [nerdfonts](https://www.nerdfonts.com/cheat-sheet)>")"
+  local color="$(get_tmux_option "@catppuccin_<module_name>_color" "<Use one of the default theme colors (ex: $thm_orange), or provide a color code (ex: #ef9f76)>")"
+  local text="$(get_tmux_option "@catppuccin_<module_name>_text" "<Provide the text that you want to be displayed>")"
+
+  local module=$( build_status_module "$index" "$icon" "$color" "$text" )
+
+  echo $module 
+}

custom/example.sh

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+show_example() {
+  local index=$1 
+  local icon="$(get_tmux_option "@catppuccin_test_icon" "󰙨")"
+  local color="$(get_tmux_option "@catppuccin_test_color" "$thm_blue")"
+  local text="$(get_tmux_option "@catppuccin_test_text" "It works!")"
+
+  local module=$( build_status_module "$index" "$icon" "$color" "$text" )
+
+  echo $module 
+}