Update CLI auth docs to use client credentials

[Soner (shyim)]

Caution

Merge this on 1 April 2026, as than the feature will be available in the Shopware Account

Summary

• Replace legacy SHOPWARE_CLI_ACCOUNT_EMAIL / SHOPWARE_CLI_ACCOUNT_PASSWORD env vars with the new SHOPWARE_CLI_ACCOUNT_CLIENT_ID / SHOPWARE_CLI_ACCOUNT_CLIENT_SECRET for CI/CD authentication
• Add guidance on where to generate client credentials (Extension Partner > Development in the Shopware Account)

Related: shopware/shopware-cli#918

Test plan

• Verify the rendered docs page displays correctly

[Copilot]

Pull request overview

Updates the Shopware CLI documentation for Shopware Account authentication to reflect the move from legacy email/password env vars to OAuth-style client credentials for CI/CD usage, and adds guidance for selecting an active company when an account belongs to multiple companies.

Changes:

• Replace CI/CD authentication guidance from SHOPWARE_CLI_ACCOUNT_EMAIL / SHOPWARE_CLI_ACCOUNT_PASSWORD to SHOPWARE_CLI_ACCOUNT_CLIENT_ID / SHOPWARE_CLI_ACCOUNT_CLIENT_SECRET.
• Add instructions to generate client credentials in the Shopware Account UI.
• Add a “Multiple companies” section with commands to list and select the active company.

Comments suppressed due to low confidence (1)

products/cli/shopware-account-commands/authentication.md:21

• This section describes using a client secret in CI/CD but removed the earlier guidance about using a dedicated account/limited access. Consider adding an explicit note to use dedicated client credentials (least privilege) and to store/rotate the client secret securely (CI secret store) to reduce the blast radius if leaked.

For CI/CD pipelines, you should pass `SHOPWARE_CLI_ACCOUNT_CLIENT_ID` and `SHOPWARE_CLI_ACCOUNT_CLIENT_SECRET` as environment variables and call directly the command you want to use. The client ID and client secret can be generated in the **Extension Partner** section under the [Development](https://account.shopware.com/producer/development) navigation point in the [Shopware Account](https://account.shopware.com).

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