Add CLI deprecation warnings about gateway routers #6943

Job	Run time
build-docs / build-docs	1m 14s
compute-version	3s
build-artifacts / frontend-build	10s
build-artifacts / gateway-build	13s
build-artifacts / runner-test (macos-latest)	1m 23s
build-artifacts / code-lint	48s
build-artifacts / runner-test (ubuntu-latest)	1m 11s
build-artifacts / generate-json-schema	23s
build-artifacts / python-build	23s
build-artifacts / python-test (macos-latest, 3.9)	3m 11s
build-artifacts / python-test (ubuntu-latest, 3.9)	5m 51s
build-artifacts / python-test (macos-latest, 3.13)	3m 9s
build-artifacts / python-test (windows-latest, 3.10)	2m 15s
build-artifacts / python-test (windows-latest, 3.9)	4m 17s
build-artifacts / python-test (ubuntu-latest, 3.10)	5m 39s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 23s
build-artifacts / python-test (macos-latest, 3.12)	2m 43s
build-artifacts / python-test (ubuntu-latest, 3.11)	5m 13s
build-artifacts / python-test (macos-latest, 3.10)	3m 32s
build-artifacts / python-test (windows-latest, 3.13)	2m 24s
build-artifacts / python-test (windows-latest, 3.11)	3m 18s
build-artifacts / python-test (windows-latest, 3.12)	3m 2s
build-artifacts / python-test (ubuntu-latest, 3.12)	5m 32s
build-artifacts / python-test (macos-latest, 3.11)	3m 53s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	33s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	31s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	20s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	24s
	1h 5m 58s

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