Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/str-collect.md

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+# str collect
+collects a list of strings into a string
+
+## Usage
+```shell
+> str collect (separator) {flags} 
+ ```
+
+## Parameters
+* `(separator)` the separator to put between the different values
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Collect a list of string
+```shell
+> echo ['a' 'b' 'c'] | str collect
+ ```
+