Add a new `@workflow/utils` package to extract common utility functions.
- Created a new `@workflow/utils` package with common utility functions:
- `parseDurationToDate()` - Parses duration strings, numbers, or Date objects
- `withResolvers()` - Polyfill for `Promise.withResolvers()`
- `once()` - Creates a lazily-evaluated, memoized function
- `PromiseWithResolvers` - Type interface for promise resolvers
- Moved these utility functions from the core package to the new utils package
- Updated imports in the core package to use the new utils package
- Added tests for the utility functions in the new package
Signed-off-by: Nathan Rajlich <n@n8.io>
Nathan Rajlich