generate strong types for engine signals and connections

is there any interest in generating strong types for connections such as:

(this is probably a poor example, I'd need to dig in and make a PR to do it correctly)

```ts
declare module godot {
interface SceneTree implements MainLoop {
//overload 1 for network_peer_connected signal
function connect(
signal: "network_peer_connected",
target: T,
method: Extract | (...args: Parameters) => void, //could use e.g. MethodOf,
binds: Tail>,
flags: number = 0,
): number;
// more overloads, one per signal for discriminating union
}
}
```

The issue names no files, tests, or type-generation entry point and presents only a tentative example. Start by locating how Godot engine signals and connections are currently exposed, then determine the generation scope and define tests that verify the resulting TypeScript types for representative signals and connections.

Written by the indexing model from the issue text.