chore(readme): Move utilities section to dedicated /docs md

This commit moves the `utilities` section of the `README.md` to
a dedicated `/docs` document to keep the README focused on
installation and configuration of the plugin.

Author: vitanovs

README.md

@@ -45,15 +45,3 @@ The plugin supports the following `global` configuration options:
 | `@tmux_kubenv_color_context_bg`   | The _background color_ of the _context_ section   | `#00DCEE`    |
 | `@tmux_kubenv_color_namespace_fg` | The _foreground color_ of the _namespace_ section | `#124F76`    |
 | `@tmux_kubenv_color_namespace_bg` | The _background color_ of the _namespace_ section | `#D69F00`    |
-
-## Utilities
-
-Helper utilities supporting the plugin functionality.
-
-### `tmux_kubenv_precmd_hook` [hook](https://zsh.sourceforge.io/Doc/Release/Functions.html#Hook-Functions) function
-
-A [ZSH](https://www.zsh.org) `precmd` [hook](https://zsh.sourceforge.io/Doc/Release/Functions.html#Hook-Functions) function that automatically updates the plugin context based on the current `KUBECONFIG` in use.
-To allow configurable _enable_/_disable_ capability to the hook, two additional functions are provided:
-
-- `tmux_kubenv_precmd_hook_enable` - __adds__ the `hook` to the `precmd_functions` list
-- `tmux_kubenv_precmd_hook_disable` - __removes__ the `hook` from the `precmd_functions` list

docs/utils.md

@@ -0,0 +1,11 @@
+# Utilities
+
+Helper utilities supporting the plugin functionality.
+
+## `tmux_kubenv_precmd_hook` [hook](https://zsh.sourceforge.io/Doc/Release/Functions.html#Hook-Functions) function
+
+A [ZSH](https://www.zsh.org) `precmd` [hook](https://zsh.sourceforge.io/Doc/Release/Functions.html#Hook-Functions) function that automatically updates the plugin context based on the current `KUBECONFIG` in use.
+To allow configurable _enable_/_disable_ capability to the hook, two additional functions are provided:
+
+- `tmux_kubenv_precmd_hook_enable` - __adds__ the `hook` to the `precmd_functions` list
+- `tmux_kubenv_precmd_hook_disable` - __removes__ the `hook` from the `precmd_functions` list