Allow for ExecuteCommandline actions to be called straight from the commandline

So I can do something like `wt good-morning` and have it immediately start up with my `Good Morning` actions. Maybe something like

```json
{
"command": {
"action": "wt",
"subcommand": "good-morning",
"commandline": "nt ; sp"
},
"name": "Good Morning"
},
```

that lets the given commandline be treated as the provided commandline.

I suppose:
* does it have to be limited to `wt` actions?
* what happens for `wt good-morning ; new-tab`?
* does `{ "command": {"action": "wt", "subcommand": "gm", "commandline": "good-morning" } }` work?

Also relevant: #6899, [#6899 - Action IDs.md](https://github.com/microsoft/terminal/blob/main/doc/specs/%236899%20-%20Action%20IDs/%236899%20-%20Action%20IDs.md)

Start with the linked #6899 Action IDs specification, then compare its action and commandline concepts with the examples in this issue. Clarify the supported command forms and chaining behavior, and consider the work complete when an ExecuteCommandline action can be invoked directly through the requested commandline syntax.

Written by the indexing model from the issue text.