Make tagged templates a first-class type #10361

Job	Run time
build-compiler (macos-15-intel, 5.3.0, true, darwin-x64, x86_64-apple-darwin, release)	17m 38s
test-devcontainer	18m 24s
build-compiler (ubuntu-24.04, ocaml-variants.5.0.0+options,ocaml-option-static, linux-x64, x86_64...	5m 23s
build-compiler (macos-15, 5.3.0, true, darwin-arm64, aarch64-apple-darwin, release)	6m 13s
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	6m 2s
build-compiler (windows-2025, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu, .exe, release)	10m 30s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	5m 59s
pkg-pr-new	1m 0s
api-docs	2m 24s
dev-playground	0s
test-installation-npm (macos-15)	23s
test-installation-npm (windows-2025)	1m 30s
test-installation-pnpm (ubuntu-24.04)	13s
test-integration-rewatch (windows-2025)	6m 31s
test-installation-pnpm (ubuntu-24.04-arm)	23s
test-installation-pnpm (macos-15-intel)	48s
test-installation-npm (ubuntu-24.04)	15s
test-installation-npm (macos-15-intel)	32s
test-installation-pnpm (macos-15)	17s
test-integration-rewatch (ubuntu-24.04)	4m 3s
test-integration-rewatch (ubuntu-24.04-arm)	3m 1s
test-integration-rewatch (macos-15)	4m 50s
test-installation-pnpm (windows-2025)	1m 17s
test-integration-rewatch (macos-15-intel)	9m 36s
test-installation-npm (ubuntu-24.04-arm)	15s
publish	0s
	1h 47m 27s

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