[FEATURE]: support awsAuthRefresh configuration on bedrock

[ilan-cyera]

Feature hasn't been suggested before.

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Describe the enhancement you want to request

In Claude Code, there is a configuration called awsAuthRefresh, which is a command to auto refresh the sso during the connection if if fails. For me, it's configured to aws sso login --profile claude.

It's very convenient since I have several profiles on AWS, and when the CLI logins to a different profile during the work, I need to login again, and it automatically works. Will glad to see this feature in opencode as well.

https://code.claude.com/docs/en/amazon-bedrock#advanced-credential-configuration