anyrender_skia: drop unused skia-safe textlayout feature (except on Windows)

[nicoburns]

Summary

anyrender_skia enabled skia-safe's textlayout feature (SkParagraph/SkShaper), but nothing in the crate uses it; text goes through draw_glyphs. This PR removes it everywhere except Windows. That shrinks the Skia build and makes the feature set closer to the combinations rust-skia publishes, including the Graphite ones, which never include textlayout.

[dependencies]
skia-safe = { version = "0.153.3", features = ["gl", "pdf"] }   # was ["gl", "pdf", "textlayout"]

[target.'cfg(windows)'.dependencies]
skia-safe = { version = "0.153.3", features = ["textlayout"] }

Windows keeps textlayout only so it stays on prebuilt binaries. rust-skia's windows-binaries.yaml matrix has ganesh,gl,textlayout,vulkan but no ganesh,gl,vulkan, which Linux does have. Without textlayout, Windows + vulkan would build Skia from source.

Prebuilt binaries (checked against the skia-binaries 0.153.3 assets, and with cargo tree --target <triple> -e features for the resolved skia-bindings features):

• Verified by building locally on aarch64-apple-darwin: the build downloads ...-aarch64-apple-darwin-ganesh-gl-jpegd-jpege-metal-pdf.tar.gz.
• Linux, Android, macOS and iOS (x86_64 and aarch64), default features: a prebuilt exists without textlayout.
• Linux and Android + vulkan: prebuilt exists.
• Windows (x86_64 and aarch64): the feature set is unchanged, so it still uses the same prebuilts as before.
• macOS + vulkan: no prebuilt either before or after this change.

Link to Devin session: https://dioxus.staging.devinenterprise.com/sessions/7b8d8492640e46d08ea6cd8b5ab63dbb
Open in Devin Desktop: https://dioxus.staging.devinenterprise.com/desktop/session/7b8d8492640e46d08ea6cd8b5ab63dbb?variant=devin-insiders
Requested by: @nicoburns

[staging-devin-ai-integration]

I'll fix CI failures and address comments from users with write access that start with 'Devin'.

• Disable automatic comment, CI, and merge conflict monitoring