Fix page.run_thread does not receive kwargs

[python-and-novella]

Description

Fixes #5318

Test Code

import flet as ft
import asyncio
import time
from datetime import datetime

async def main(page: ft.Page):
    page.add(
        text := ft.Text(f'{datetime.now()}'),
        text2 := ft.Text(f'{datetime.now()}')
    )
    async def update_time(name=None,*,end=''):
        while True:
            text.value = f'{name} is {datetime.now()} {end}'
            text.update()
            await asyncio.sleep(1)
            
    page.run_task(update_time,'Time',end='.')
    
    def update_time_sync(name=None,*,end=''):
        while True:
            text2.value = f'{name} is {datetime.now()} {end}'
            text2.update()
            time.sleep(1)
            
    page.run_thread(update_time_sync,'Time',end='.')

    
ft.app(target=main)

Type of change

• Bug fix (non-breaking change which fixes an issue)

Summary by Sourcery

Bug Fixes:

• Allow page.run_thread (and page.run_task) to receive keyword arguments by updating the internal wrapper to accept and forward **kwargs.

[CLAassistant]

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