Wrap nushell integration script in a module

This prevents the completion command "nu-complete __zoxide_z" from
polluting the command namespace.

templates/nushell.txt

@@ -1,21 +1,23 @@
-{%- let section = "# =============================================================================\n#" -%}
+{%- let section = "# =============================================================================" -%}
 {%- let not_configured = "# -- not configured --" -%}
 
 # Code generated by zoxide. DO NOT EDIT.
 
-const homedir = if $nu.home-dir? != null { $nu.home-dir } else { $nu.home-path }
+module zoxide_integration {
+  const homedir = if $nu.home-dir? != null { $nu.home-dir } else { $nu.home-path }
 
-{{ section }}
-# Hook configuration for zoxide.
-#
+  {{ section }}
+  #
+  # Hook configuration for zoxide.
+  #
 
-{% if hook == InitHook::None -%}
-{{ not_configured }}
+  {% if hook == InitHook::None -%}
+  {{ not_configured }}
 
-{%- else -%}
-# Initialize hook to add new entries to the database.
-export-env {
-{%- if hook == InitHook::Prompt %}
+  {%- else -%}
+  # Initialize hook to add new entries to the database.
+  export-env {
+  {%- if hook == InitHook::Prompt %}
     $env.config = (
       $env.config?
       | default {}
@@ -31,7 +33,7 @@ export-env {
         code: {|| ^zoxide add -- $env.PWD}
       })
     }
-{%- else if hook == InitHook::Pwd %}
+  {%- else if hook == InitHook::Pwd %}
     $env.config = (
       $env.config?
       | default {}
@@ -48,16 +50,17 @@ export-env {
         code: {|_, dir| ^zoxide add -- $dir}
       })
     }
-{%- endif %}
-}
+  {%- endif %}
+  }
 
-{%- endif %}
+  {%- endif %}
 
-{{ section }}
-# Completion for __zoxide_z
-#
+  {{ section }}
+  #
+  # Completion for __zoxide_z
+  #
 
-def "nu-complete __zoxide_z" [context: string] {
+  def "nu-complete __zoxide_z" [context: string] {
     let ast = ast --flatten $context | skip 1
 
     # If the user has typed a space after the first argument, use the custom
@@ -81,14 +84,15 @@ def "nu-complete __zoxide_z" [context: string] {
       }
       completions: $completions,
     }
-}
+  }
 
-{{ section }}
-# When using zoxide with --no-cmd, alias these internal functions as desired.
-#
+  {{ section }}
+  #
+  # When using zoxide with --no-cmd, alias these internal functions as desired.
+  #
 
-# Jump to a directory using only keywords.
-export def --env --wrapped __zoxide_z [...rest: directory@"nu-complete __zoxide_z"] {
+  # Jump to a directory using only keywords.
+  export def --env --wrapped __zoxide_z [...rest: directory@"nu-complete __zoxide_z"] {
     let path = match $rest {
       [] => {'~'},
       [ '-' ] => {'-'},
@@ -98,36 +102,41 @@ export def --env --wrapped __zoxide_z [...rest: directory@"nu-complete __zoxide_
       }
     }
     cd $path
-{%- if echo %}
+  {%- if echo %}
     echo $env.PWD
-{%- endif %}
-}
+  {%- endif %}
+  }
 
-# Jump to a directory using interactive search.
-export def --env --wrapped __zoxide_zi [...rest: string] {
+  # Jump to a directory using interactive search.
+  export def --env --wrapped __zoxide_zi [...rest: string] {
     cd $'(^zoxide query --interactive -- ...$rest | str trim -r -c "\n")'
-{%- if echo %}
+  {%- if echo %}
     echo $env.PWD
-{%- endif %}
+  {%- endif %}
+  }
+
+  {{ section }}
+  #
+  # Commands for zoxide. Disable these using --no-cmd.
+  #
+
+  {%- match cmd %}
+  {%- when Some with (cmd) %}
+
+  export alias {{cmd}} = __zoxide_z
+  export alias {{cmd}}i = __zoxide_zi
+
+  {%- when None %}
+
+  {{ not_configured }}
+
+  {%- endmatch %}
 }
 
+export use zoxide_integration *
+
 {{ section }}
-# Commands for zoxide. Disable these using --no-cmd.
 #
-
-{%- match cmd %}
-{%- when Some with (cmd) %}
-
-export alias {{cmd}} = __zoxide_z
-export alias {{cmd}}i = __zoxide_zi
-
-{%- when None %}
-
-{{ not_configured }}
-
-{%- endmatch %}
-
-{{ section }}
 # Add this to your env file (find it by running `$nu.env-path` in Nushell):
 #
 #   zoxide init nushell | save -f ~/.zoxide.nu