Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

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* Delete empty?.md

docs/commands/load-env.md

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+# load-env
+Set environment variables using a table stream
+
+## Usage
+```shell
+> load-env (environ) {flags} 
+ ```
+
+## Parameters
+* `(environ)` Optional environment table to load in. If not provided, will use the table provided on the input stream
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Load variables from an input stream
+```shell
+> echo [[name, value]; ["NAME", "JT"] ["AGE", "UNKNOWN"]] | load-env; echo $nu.env.NAME
+ ```
+
+  Load variables from an argument
+```shell
+> load-env [[name, value]; ["NAME", "JT"] ["AGE", "UNKNOWN"]]; echo $nu.env.NAME
+ ```
+
+  Load variables from an argument and an input stream
+```shell
+> echo [[name, value]; ["NAME", "JT"]] | load-env [[name, value]; ["VALUE", "FOO"]]; echo $nu.env.NAME $nu.env.VALUE
+ ```
+