feat(llm): add Google Gemini, AWS Bedrock, io.net, Mistral, Yandex, and Cloudflare WS AI providers (#676)

* feat(llm): add Google Gemini and AWS Bedrock providers

* feat(llm): add io.net, Mistral, Yandex, and Cloudflare WS AI providers

src/llm/registry.rs

@@ -450,6 +450,8 @@ mod tests {
             if def.protocol == ProviderProtocol::OpenAiCompletions
                 && def.id != "openai"
                 && def.id != "openai_compatible"
+                && def.id != "bedrock"
+                && def.id != "cloudflare"
             {
                 assert!(
                     def.default_base_url.is_some(),