feat(config): allow users to define config dir

This commit introduces a change to allow users to set a custom
configuration directory for Komorebi to address concerns about $HOME
getting cluttered.

The custom directory can be set with the environment variable
$Env:KOMOREBI_CONFIG_HOME (this should probably be done in $PROFILE).

If this variable is not set, komorebi will default to using
the $HOME directory.

resolve #61

README.md

@@ -140,6 +140,32 @@ for _komorebi_ can be found [here](https://gist.github.com/crosstyan/dafacc0778d
 
 ### Common First-Time Tips
 
+#### Setting a Custom KOMOREBI_CONFIG_HOME Directory
+
+If you do not want to keep _komorebi_-related files in your `$Env:UserProfile` directory, you can specify a custom directory
+by setting the `$Env:KOMOREBI_CONFIG_HOME` environment variable.
+
+For example, to use the `~/.config/komorebi` directory:
+
+```powershell
+# Run this command to make sure that the directory has been created
+mkdir -p ~/.config/komorebi
+
+# Run this command to open up your PowerShell profile configuration in Notepad
+notepad $PROFILE
+
+# Add this line (with your login user!) to the bottom of your PowerShell profile configuration
+$Env:KOMOREBI_CONFIG_HOME = 'C:\Users\LGUG2Z\.config\komorebi'
+
+# Save the changes and then reload the PowerShell profile
+. $PROFILE
+```
+
+If you already have configuration files that you wish to keep, move them to the `~/.config/komorebi` directory.
+
+The next time you run `komorebic start`, any files created by or loaded by _komorebi_ will be placed or expected to
+exist in this folder.
+
 #### Floating Windows
 
 Sometimes you will want a specific application to never be tiled, and instead float all the time. You add add rules to