refactor: use consistent parameter name for scope

[remcojansen]

Ensures all subcommands consistently use scope as the parameter for accepting requested scope (and not the plural form scopes that was used previously by some subcommands).

[Copilot]

Pull request overview

This PR standardizes CLI scope flag naming by moving affected commands from --scopes to --scope while preserving deprecated --scopes handling.

Changes:

• Renames OIDC flow config fields from Scopes to Scope.
• Adds deprecated --scopes aliases for affected commands.
• Updates documentation and existing tests to use --scope.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
README.md	Updates run example to use --scope.
EXAMPLES.md	Updates usage examples to use --scope.
oidc/authorization_code.go	Renames authorization code flow config field to Scope.
oidc/client_credentials.go	Renames client credentials flow config field to Scope.
oidc/token_refresh.go	Renames token refresh flow config field to Scope.
cmd/authorization_code_cfg.go	Adds --scope and deprecated --scopes flag handling.
cmd/client_credentials_cfg.go	Adds --scope and deprecated --scopes flag handling.
cmd/token_refresh_cfg.go	Adds --scope and deprecated --scopes flag handling.
cmd/scopes_flag_deprecation.go	Adds shared deprecation warning/conflict detection helper.
cmd/authorization_code_cfg_test.go	Updates parser tests to use --scope.
cmd/client_credentials_cfg_test.go	Updates parser tests to use --scope.
cmd/token_refresh_cfg_test.go	Updates parser tests to use --scope.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated no new comments.