feat(effect): consolidate effect utilities into one

[XavierDupessey]

Hello,

ngextensions currently contains several utilities built around effects, such as explicitEffect, effectOnceIf, reactive on, and possibly others.

I'd like to get your feedback on introducing a single effect utility that could cover all of these use cases.

To demonstrate the idea, I updated the existing unit tests for those utilities to use the new implementation instead. This should make it easier to compare the different APIs and see how they translate to the proposed one.

Some characteristics of the new utility:

• It enforces explicit dependencies, which I believe is a good practice.
• It exposes both the current and previous dependency values.
• It provides access to the previous return value.
• It supports deferring the first execution (defer option).
• It permits to filter specific values with a predicate function (filter option).
• It allows executing the function only once (once option).

I'm curious to hear your thoughts. Any feedback, suggestions, or concerns are very welcome! 🙂

[gemini-code-assist]

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