Allow $ in identifiers #9068

Job	Run time
build-compiler (ubuntu-24.04, ocaml-variants.5.0.0+options,ocaml-option-static, linux-x64, x86_64...	3m 25s
build-compiler (macos-15, 5.3.0, true, darwin-arm64, aarch64-apple-darwin)	5m 23s
build-compiler (macos-15-intel, 5.3.0, true, darwin-x64, x86_64-apple-darwin)	6m 29s
build-compiler (windows-2025, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu, .exe)	6m 47s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	4m 18s
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	2m 56s
pkg-pr-new	56s
api-docs	1m 27s
test-installation-npm (ubuntu-24.04)	13s
test-installation-npm (windows-2025)	41s
test-integration-rewatch (macos-15-intel)	2m 44s
test-integration-rewatch (macos-15)	2m 8s
test-installation-pnpm (macos-15)	18s
test-installation-npm (macos-15)	15s
test-installation-pnpm (windows-2025)	32s
test-installation-npm (ubuntu-24.04-arm)	21s
test-installation-pnpm (macos-15-intel)	42s
test-installation-npm (macos-15-intel)	22s
test-integration-rewatch (windows-2025)	3m 10s
test-installation-pnpm (ubuntu-24.04-arm)	22s
test-integration-rewatch (ubuntu-24.04)	1m 21s
test-integration-rewatch (ubuntu-24.04-arm)	1m 22s
test-installation-pnpm (ubuntu-24.04)	11s
publish	0s
	46m 23s

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