feat(useToFixed): new function

[FliPPeDround]

Description

Reactive toFixed

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[wheatjs]

I think either useToFixed or usePrecision would be a better name for this function. At first I think it had something to do with the css position: fixed so it might cause some confusion haha

[FliPPeDround]

yes,I think its a great idea! useFixed will cause some confusions. Now it has a better name useToFixed :P

[HANDSOME-YANGSHAO]

It`s a useful function, which integrates ceil, floor, and round to improve usability.