This commit improves the dependency injection mechanism by introducing a
custom `injectKey` function.
Key improvements are:
- Enforced type consistency during dependency registration and
instantiation.
- Simplified injection process, abstracting away the complexity with a
uniform API, regardless of the dependency's lifetime.
- Eliminated the possibility of `undefined` returns during dependency
injection, promoting fail-fast behavior.
- Removed the necessity for type casting to `symbol` for injection keys
in unit tests by using existing types.
- Consalidated imports, combining keys and injection functions in one
`import` statement.
This commit simplifies event handling, providing a unified and robust
way to handle event lifecycling. This way, it fixes events not being
unsubscribed when state is changed.
Introduce a new function in `EventSubscriptionCollection` to remove
existing events and adding new events. This provides an easier to use
API, which leads to code that's easier to understand. It also prevents
potential bugs that may occur due to forgetting to call both functions.
It fixes `TheScriptsMenu` not unregistering events on state change.
Other improvements include:
- Include a getter to get total amount of registered subcriptions.
This helps in unit testing.
- Have nullish checks to prevent potential errors further down the
execution.
- Use array instead of rest parameters to increase readability and
simplify tests.
Ensure `SliderHandler` stops resizes on unmount, unsubscribing from all
events and resetting state to default.
Update `injectionKeys` to do imports as types to avoid circular
dependencies. Simplify importing `injectionKeys` to enable and strict
typings for iterating injection keys.
Add tests covering new behavior.
