feat(nushell): add some config options

overlays/derivations/nu/cfg/env.nu

@@ -17,17 +17,26 @@
 # You can remove these comments if you want or leave
 # them for future reference.
 
-$env.config = {
-  hooks: {
-    pre_prompt: [{ ||
-      if (which direnv | is-empty) {
-        return
-      }
+def co
 
-      direnv export json | from json | default {} | load-env
-      if 'ENV_CONVERSIONS' in $env and 'PATH' in $env.ENV_CONVERSIONS {
-        $env.PATH = do $env.ENV_CONVERSIONS.PATH.from_string $env.PATH
-      }
-    }]
+$env = {
+  config = {
+    hooks: {
+      pre_prompt: [{ ||
+        if (which direnv | is-empty) {
+          return
+        }
+  
+        direnv export json | from json | default {} | load-env
+        if 'ENV_CONVERSIONS' in $env and 'PATH' in $env.ENV_CONVERSIONS {
+          $env.PATH = do $env.ENV_CONVERSIONS.PATH.from_string $env.PATH
+        }
+      }]
+    }
+    table: {
+      mode = "heavy"
+    }
+    show_banner: false
   }
+  LS_COLOURS = ""
 }