feat(useRafFn, useIntervalFn, useTimeoutFn): make status readonly

[rotu]

Description

1. isPending / isActive is now read-only, so they are not seen as an alternative to the pause/start/result/stop functions.
2. Minor fixes for type correctness.

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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