Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/if.md

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+# if
+Run blocks if a condition is true or false.
+
+## Usage
+```shell
+> if <condition> <then_case> <else_case> {flags} 
+ ```
+
+## Parameters
+* `<condition>` the condition that must match
+* `<then_case>` block to run if condition is true
+* `<else_case>` block to run if condition is false
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Run a block if a condition is true
+```shell
+> let x = 10; if $x > 5 { echo 'greater than 5' } { echo 'less than or equal to 5' }
+ ```
+
+  Run a block if a condition is false
+```shell
+> let x = 1; if $x > 5 { echo 'greater than 5' } { echo 'less than or equal to 5' }
+ ```
+