refactor: reorganize utils

[nathanfallet]

A lot of code was repeated between platforms, and Utils was gathering junk. So everything was split to proper places, and platform specific code was reorganized to be using as much common code as possible.

[codecov]

Codecov Report

❌ Patch coverage is 64.28571% with 65 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...in/dev/kdriver/core/browser/BrowserSearchConfig.kt	48.42%	43 Missing and 6 partials ⚠️
...ain/kotlin/dev/kdriver/core/browser/Process.jvm.kt	83.87%	0 Missing and 5 partials ⚠️
...n/dev/kdriver/core/connection/DefaultConnection.kt	50.00%	3 Missing and 1 partial ⚠️
...mmonMain/kotlin/dev/kdriver/core/dom/Extensions.kt	80.00%	1 Missing and 3 partials ⚠️
...Main/kotlin/dev/kdriver/core/dom/DefaultElement.kt	40.00%	0 Missing and 3 partials ⚠️

📢 Thoughts on this report? Let us know!