Add BrowserInfo model to expose browser window and navigator APIs

[philippjfr]

Provides various pieces information about the browser.

• dark_mode: Whether the user prefers dark mode.
• device_pixel_ratio: Provides the ratio of the resolution in physical pixels to the resolution in CSS pixels for the current display device.
• language: The preferred language of the user, usually the language of the browser UI.
• timezone: The timezone configured as the local timezone of the user.
• timezone_offset: The time offset from UTC in minutes.
• webdriver: Indicates whether the user agent is controlled by automation.

[codecov]

Codecov Report

Merging #4533 (ded8dca) into main (587e0c4) will increase coverage by 9.70%.
The diff coverage is 70.61%.

@@            Coverage Diff             @@
##             main    #4533      +/-   ##
==========================================
+ Coverage   73.64%   83.34%   +9.70%     
==========================================
  Files         255      258       +3     
  Lines       36823    36944     +121     
==========================================
+ Hits        27117    30791    +3674     
+ Misses       9706     6153    -3553     

Flag	Coverage Δ
ui-tests	39.65% <47.93%> (?)
unitexamples-tests	73.39% <62.88%> (-0.25%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
panel/tests/ui/io/test_convert.py	95.86% <ø> (+80.99%)	⬆️
panel/tests/widgets/test_tables.py	99.89% <ø> (ø)
panel/config.py	55.76% <22.22%> (-0.58%)	⬇️
panel/viewable.py	66.22% <51.47%> (-1.56%)	⬇️
panel/io/browser.py	73.17% <73.17%> (ø)
panel/tests/ui/io/test_browser.py	83.33% <83.33%> (ø)
panel/io/state.py	70.81% <93.33%> (+0.57%)	⬆️
panel/template/base.py	78.37% <95.23%> (+0.40%)	⬆️
panel/io/convert.py	73.30% <100.00%> (+47.41%)	⬆️
panel/io/notebook.py	42.62% <100.00%> (ø)
... and 3 more

... and 40 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[MarcSkovMadsen]

Just for info. Dash just added a Geolocation component.