feat: WIP allow text to be dynamic

[davidxia]

Description of new feature, or changes

Allow text to be dynamic by providing a function like so.

with Halo(text=lambda: f'date {datetime.datetime.now()}'):
    time.sleep(100)

Checklist

• [x] Your branch is up-to-date with the base branch
• [ ] You've included at least one test if this is a new feature
• [ ] All tests are passing

Related Issues and Discussions

closed #167

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