Use new skiko API to provide font fallbacks

[eymar]

TODO:

• Add API to configure the fallback fonts provider when all default methods return null  skiko#935 - should me merged first
• Use published skiko version instead of the locally built SNAPSHOT skiko

Description:

This PR updates the implementation details of FontCache in skikoMain:

• It relies on new skiko API to ensure that manually preloaded and registered fonts can be used as a last fallback, when other fallbacks didn't work out
• Update the k/wasm demo, so it preloads the emojis font

Fixes:

• Text composable on web doesn't render text with emoji strings properly compose-multiplatform#3051
• CJK words can not correctly show in the browser compose-multiplatform#3967

With this change, it's possible to mix different characters in one Text without composing the text using AnnotatedString.
Although, when the most of glyphs are known to be from a particular font, it's more performant to specify the font explicitly when using Text(...) component or via Theme.

Usage example:

The fallbacks won't work automatically, the fallback fonts should be preloaded like this:

val fontFamilyResolver = LocalFontFamilyResolver.current

...

LaunchedEffect(Unit) {
      val notoEmojisBytes = loadEmojisFontAsBytes() // loadRes(notoColorEmoji).toByteArray()
      val fontFamily = FontFamily(listOf(Font("NotoColorEmoji", notoEmojisBytes)))
      fontFamilyResolver.preload(fontFamily)
      fontsLoaded.value = true
}

Testing

• Open compose multiplatform core demo: (./gradlew :compose:mpp:demo:wasmJsBrowserRun)
• Go to Components -> Text Field -> Emojis
• Both text fields should show the emojis

This should be tested by QA

Release Notes

Fixes - Web

• Allow preloading the fallback fonts. This enables the usage of emojis and other unicode characters without manually composing the Text with AnnotatedString.

[eymar]

It affects all targets.
In most cases desktop and ios won't be affected, because the default font manager can provide the fallbacks, and therefore the new logic in skiko won't be used.