feat(webview): add OpenAI Codex speed selector #3622

Job	Run time
dependency-review	8s
knip	38s
check-translations	40s
platform-unit-test (windows-latest)	7m 27s
compile	2m 23s
invisible-chars	10s
platform-unit-test (ubuntu-latest)	4m 50s
	16m 16s

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