feat(core): Add Tournament as the new default expression evaluator (#6964)

Github issue / Community forum post (link here to close automatically):

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Co-authored-by: Omar Ajoue <krynble@gmail.com>
Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/workflow/src/index.ts

@@ -1,5 +1,6 @@
 import * as LoggerProxy from './LoggerProxy';
 export * as ErrorReporterProxy from './ErrorReporterProxy';
+export * as ExpressionEvaluatorProxy from './ExpressionEvaluatorProxy';
 import * as NodeHelpers from './NodeHelpers';
 import * as ObservableObject from './ObservableObject';
 import * as TelemetryHelpers from './TelemetryHelpers';