Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/char.md

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+# char
+Output special characters (e.g., 'newline').
+
+## Usage
+```shell
+> char (character) ...args {flags} 
+ ```
+
+## Parameters
+* `(character)` the name of the character to output
+* ...args: multiple Unicode bytes
+
+## Flags
+* -h, --help: Display this help message
+* -l, --list: List all supported character names
+* -u, --unicode: Unicode string i.e. 1f378
+
+## Examples
+  Output newline
+```shell
+> char newline
+ ```
+
+  Output prompt character, newline and a hamburger character
+```shell
+> echo (char prompt) (char newline) (char hamburger)
+ ```
+
+  Output Unicode character
+```shell
+> char -u 1f378
+ ```
+
+  Output multi-byte Unicode character
+```shell
+> char -u 1F468 200D 1F466 200D 1F466
+ ```
+