feat(createEventHook): allow trigger to optionally have no parameters

[curtgrimes]

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Description

Previously, createEventHook()'s trigger() would always require at least one parameter:

const { trigger } = createEventHook();

trigger();
//      ^
// TypeScript error: Expected 1 arguments, but got 0

Now, parameters are optional. This allows a use case where there is no other information to send when triggering an event, and simply knowing that an event was triggered is all that is needed:

const { on, trigger } = createEventHook();

// This is now possible:
trigger(/* having no arguments is now allowed */);

// Elsewhere, we can listen for the event:
on((/* no arguments */) => {})

Additional context

I ran into a need for this when I was using createEventHook() for some kind of simple event where I had no other information to provide on trigger(), and I only cared about the fact that an event was triggered.

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🤖 Generated by Copilot at 251b985

This pull request enhances the createEventHook function and its interface to support events without parameters. It also adds a new test case and refactors the type definitions for the event hook callbacks.

🤖 Generated by Copilot at 251b985

• Simplify type signatures of event hook functions by introducing a new type alias Callback<T> that can handle both parameterized and parameterless callbacks (link,link)
• Allow event hook to trigger events with or without parameters by making the trigger function accept an optional parameter of type T and invoking the callbacks accordingly (link)
• Add a new test case in createEventHook/index.test.ts to verify that the event hook can be triggered without any parameters and that the registered callbacks are fired (link)