Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/str-pascal-case.md

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+# str pascal-case
+converts a string to PascalCase
+
+## Usage
+```shell
+> str pascal-case ...args {flags} 
+ ```
+
+## Parameters
+* ...args: optionally convert text to PascalCase by column paths
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  convert a string to PascalCase
+```shell
+> echo 'nu-shell' | str pascal-case
+ ```
+