Call Command - List of available functions to call/some sort of autocomplete

### Describe the project you are working on

Visual Novel using the plugin

### Describe the feature / enhancement and how it helps to overcome the problem or limitation

The Call Command should let you auto-fill the required properties for whatever command you are using. It should also display available functions for that targeted object. Otherwise, you have to double-check with the code or documentation to fill in the required parameters and fiddle with the inspector's array view to get the stuff you need working.

### Adittional information

_No response_