CLI for cdc changefeed

[shiyuhang0]

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[github-actions]

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• internal/cli/serverless/changefeed/template.go

Use this command to fix any missing license headers

```bash

docker run -it --rm -v $(pwd):/github/workspace apache/skywalking-eyes header fix

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[pingcap-cla-assistant]

All committers have signed the CLA.

[github-actions]

license-eye has checked 727 files.

Valid	Invalid	Ignored	Fixed
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• internal/cli/serverless/changefeed/ui.go

Use this command to fix any missing license headers

```bash

docker run -it --rm -v $(pwd):/github/workspace apache/skywalking-eyes header fix

</details>

[Copilot]

Pull Request Overview

This pull request adds comprehensive CLI support for managing CDC (Change Data Capture) changefeeds in TiDB Cloud Serverless clusters.

Key Changes:

• Added new changefeed command with CRUD operations (create, list, describe, edit, delete)
• Implemented pause/resume functionality for changefeeds
• Added template command to help users with JSON configuration
• Integrated CDC API client methods into the existing client infrastructure

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
internal/service/cloud/logic.go	Added Changefeed struct and GetSelectedChangefeed function for interactive changefeed selection
internal/service/cloud/api_client.go	Added CDC API client integration and implemented all changefeed-related API methods (create, delete, edit, get, list, start, stop, test, describe schema)
internal/mock/api_client.go	Added mock implementations for all new CDC API methods to support testing
internal/flag/flag.go	Defined new flag constants for changefeed operations (type, name, kafka, mysql, filter, start-tso, id, explain, template type)
internal/cli/serverless/cluster.go	Integrated changefeed command into the serverless cluster command structure
internal/cli/serverless/changefeed/ui.go	Created UI helper functions for interactive changefeed type selection and input descriptions for Kafka and MySQL configurations
internal/cli/serverless/changefeed/template.go	Implemented template command to display JSON configuration examples for Kafka, MySQL, and filter setups
internal/cli/serverless/changefeed/resume.go	Implemented resume command to restart paused changefeeds
internal/cli/serverless/changefeed/pause.go	Implemented pause command to stop running changefeeds
internal/cli/serverless/changefeed/list.go	Implemented list command to display all changefeeds with support for JSON and human-readable output
internal/cli/serverless/changefeed/edit.go	Implemented edit command to update changefeed configurations (name, kafka/mysql info, filter)
internal/cli/serverless/changefeed/describe.go	Implemented describe command to show detailed changefeed information
internal/cli/serverless/changefeed/delete.go	Implemented delete command with confirmation prompt for safe changefeed removal
internal/cli/serverless/changefeed/create.go	Implemented create command supporting both Kafka and MySQL sink types with optional start TSO
internal/cli/serverless/changefeed/changefeed.go	Main changefeed command entry point that organizes all subcommands

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[Copilot]

Pull Request Overview

Copilot reviewed 27 out of 27 changed files in this pull request and generated 4 comments.

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