zauberzeug/nicegui v1.4.31 on GitHub

Introduce a new integration test framework (#1931, #2496, #3121, #3413 by @rodja, @ed2050, @MarcDelahousse, @codingpaula, @falkoschindler):
- a new user fixture cuts away the browser and replaces it by a lightweight simulation entirely in Python; a test for a login page can now be written like this:
```
      async def test_login():
          await user.open('/')
          user.find('Username').type('user1')
          user.find('Password').type('pass1').trigger('keydown.enter')
          await user.should_see('Hello user1!')
          user.find('logout').click()
          await user.should_see('Log in')
```
- a new ElementFilter allows to find and manipulate UI elements during tests and in production
- a new pytest plugin allows to use both NiceGUI fixtures screen and user via pytest_plugins = ['nicegui.testing.plugin']
Remove icecream dependency (#3439 by @falkoschindler)
Provide tests for [https://nicegui.io/documentation/section_action_events#running_i_o-bound_tasks) and run.cpu_bound (#2234 by @rodja, @falkoschindler)

Add more links to the documentation (#3434 by @rodja)
Improve the documentation overview (#3409 by @rodja)
Say browser session cookie is "signed", not "encrypted" (#3424 by @NickCrews)
Restrict access to all routes in the "Authentication" example (#3403, #3417 by @Daniel-Fei, @falkoschindler, @rodja)