Remove company selection from account commands

[Soner (shyim)]

Summary

• Remove account company list, account company use, and account producer info commands
• Switch producer endpoint from /companies/{id}/allocations to the new /integrations/shopwarecli/producers API which returns all producers for the authenticated user across all companies
• Remove Membership, MyProfile, and company-related types from the account API client
• Remove company field from CLI config (SHOPWARE_CLI_ACCOUNT_COMPANY env var and account.company yaml field)
• Binary operations (GetExtensionBinaries, CreateExtensionBinary, UpdateExtensionBinaryInfo, UpdateExtensionBinaryFile) now take producerId from the extension's Producer.Id field instead of the client's active company

Closes #895

Test plan

• go build ./... passes
• go test ./internal/config/... passes
• Verify shopware-cli account login works with existing credentials
• Verify shopware-cli account producer extension list returns extensions from all producers
• Verify shopware-cli account producer extension upload works correctly with ext.Producer.Id

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR removes the “active company” concept from shopware-cli account flows and updates the account API client/commands to operate across all producers available to the authenticated user, using the new /integrations/shopwarecli/producers endpoint.

Changes:

• Removed company-selection commands and related account API types (memberships/profile) plus the company config/env var.
• Switched producer discovery to the new integrations endpoint and updated extension listing to aggregate across multiple producers.
• Updated binary upload operations to use ext.Producer.Id (explicit producerId) instead of an “active company”.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
internal/config/config_test.go	Updates config tests to reflect removal of account.company.
internal/config/config.go	Removes company field and setters/getters from persisted/env config.
internal/account-api/updates.go	Uses ApiUrl constant instead of hardcoded base URL for autoupdate endpoint.
internal/account-api/profile.go	Deletes unused “MyProfile” API and types.
internal/account-api/producer_extension.go	Binary endpoints now take explicit producerId parameter.
internal/account-api/producer.go	Producer discovery uses integrations endpoint; extension listing aggregates across producer IDs.
internal/account-api/login.go	Removes membership fetching/types during login flow.
internal/account-api/client.go	Removes membership/company helpers from the API client and related logging.
cmd/account/account_producer_info.go	Removes producer info command.
cmd/account/account_producer_extension_upload.go	Passes ext.Producer.Id into binary operations.
cmd/account/account_logout.go	Stops clearing company config on logout (company config removed).
cmd/account/account_login.go	Removes membership switching and profile greeting; simplifies login output.
cmd/account/account_company_use.go	Removes company switching command.
cmd/account/account_company_list.go	Removes company listing command.
cmd/account/account_company.go	Removes account company command root.

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