Add ability to tag resources that agentcore cli creates

Currently `agentcore `can create resources but is unable to tag them. Another call to `aws bedrock-agentcore tag-resource` is required. Would be great if it was combined into the original agentcore call as an option.

Start at the agentcore CLI command that creates resources and compare its inputs with the AWS bedrock-agentcore tag-resource call. Identify which created resources and tag arguments the existing command supports; done means a caller can provide tags during creation without a separate tagging command, with the existing creation behavior preserved.

Written by the indexing model from the issue text.