update #4455, regenerate commands' docs and update make_docs script (#4586)

* feat: update #4455, regenerate commands' docs

* chore: update make_docs script

docs/commands/hide.md

@@ -14,3 +14,19 @@ Hide symbols in the current scope
 
  -  `pattern`: import pattern
 
+## Examples
+
+Hide the alias just defined
+```shell
+> alias lll = ls -l; hide lll
+```
+
+Hide a custom command
+```shell
+> def say-hi [] { echo 'Hi!' }; hide say-hi
+```
+
+Hide an environment variable
+```shell
+> let-env HZ_ENV_ABC = 1; hide HZ_ENV_ABC; 'HZ_ENV_ABC' in (env).name
+```