Improve unclear error and warning messages (#8460) #10356

Job	Run time
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	5m 57s
build-compiler (windows-2025, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu, .exe, release)	11m 11s
build-compiler (macos-15, 5.3.0, true, darwin-arm64, aarch64-apple-darwin, release)	6m 58s
build-compiler (macos-15-intel, 5.3.0, true, darwin-x64, x86_64-apple-darwin, release)	10m 33s
build-compiler (ubuntu-24.04, ocaml-variants.5.0.0+options,ocaml-option-static, linux-x64, x86_64...	6m 20s
test-devcontainer	19m 28s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	6m 55s
api-docs	2m 24s
dev-playground	28s
pkg-pr-new	57s
test-integration-rewatch (macos-15)	4m 19s
test-integration-rewatch (ubuntu-24.04-arm)	3m 2s
test-installation-pnpm (windows-2025)	49s
test-installation-pnpm (ubuntu-24.04-arm)	36s
test-integration-rewatch (macos-15-intel)	7m 33s
test-installation-pnpm (ubuntu-24.04)	21s
test-installation-npm (ubuntu-24.04)	14s
test-installation-npm (ubuntu-24.04-arm)	17s
test-installation-pnpm (macos-15-intel)	34s
test-installation-npm (windows-2025)	43s
test-integration-rewatch (windows-2025)	7m 56s
test-installation-npm (macos-15-intel)	36s
test-installation-npm (macos-15)	18s
test-integration-rewatch (ubuntu-24.04)	4m 1s
test-installation-pnpm (macos-15)	20s
publish	0s
	1h 42m 50s

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