Use ServeDir for fullstack dev static assets #10547

Job	Run time
Check MSRV	39s
Test Suite	3m 58s
Rustfmt	35s
Playwright Tests (beta)	5m 7s
Test Docs	2m 16s
Check	1m 6s
Test Suite with Optimizations	5m 35s
cargo test \| windows	12m 55s
Clippy	1m 19s
Docs	2m 52s
nix (blacksmith-4vcpu-ubuntu-2404)	22m 19s
matrix_test (aarch64-unknown-linux-gnu, ubuntu-24.04-arm, 1.88.0, false, build, --all --tests, de...	13m 42s
nix (macos-latest)	34m 52s
matrix_test (aarch64-apple-ios, macos-latest, 1.88.0, false, build, --package dioxus-desktop, ios)	52s
matrix_test (aarch64-linux-android, blacksmith-4vcpu-ubuntu-2404, 1.88.0, true, build, --package ...	1m 27s
matrix_test (aarch64-apple-darwin, macos-latest, 1.88.0, false, test, --all --tests, desktop)	6m 47s
	1h 56m 21s

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