Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/merge.md

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+# merge
+Merge a table.
+
+## Usage
+```shell
+> merge <block> {flags} 
+ ```
+
+## Parameters
+* `<block>` the block to run and merge into the table
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Merge a 1-based index column with some ls output
+```shell
+> ls | select name | keep 3 | merge { echo [1 2 3] | wrap index }
+ ```
+