implement codeaction/resolve #2540
Description
Describe the Bug
pyrefly's main thread is blocked on code actions. I thought the CodeActionTriggerKind::AUTOMATIC filtering would help, but it looks like there are still too many code actions slowing pyrefly down.
in real-world testing, introduce_parameter takes >5s p95, almost 20 seconds p99. vscode asks for this a lot more frequently than it should.
we should ensure all of these code actions are quick to check
Sandbox Link
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(Only applicable for extension issues) IDE Information
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