安装 Google Cloud Bigtable 技能插件

从 Data Agent Kit 安装 bigtable@data-agent-kit。插件提供技能，通过 gcloud 和 cbt 操作 Bigtable，不会自动登记 MCP 服务。

gcloud auth application-default login

codex plugin marketplace add GoogleCloudPlatform/data-agent-kit
codex plugin add bigtable@data-agent-kit
codex plugin list

# 可选：
# codex plugin marketplace upgrade data-agent-kit
# export BIGTABLE_EMULATOR_HOST=localhost:8086

# 不要：
# plugin install bigtable@data-agent-kit
# plugin add bigtable@cloud-bigtable-ecosystem
# /plugin install bigtable@data-agent-kit
# gemini extensions install https://github.com/GoogleCloudPlatform/cloud-bigtable-ecosystem
# git clone https://github.com/GoogleCloudPlatform/cloud-bigtable-ecosystem.git
# export BIGTABLE_PROJECT
# export BIGTABLE_PROJECT_ID
# codex mcp add bigtable --url https://bigtableadmin.googleapis.com/mcp
# codex mcp login bigtable
# command = "./PATH/TO/toolbox"