* docs: Update Remote Taskfiles default values
This change updates the documentation for [Remote Taskfiles > Configuration](https://taskfile.dev/docs/experiments/remote-taskfiles#configuration) for `timeout` and `cache-expiry` to match the defaults in code.
* docs: Update `cache-expiry` default to 0s
* docs: Update executor.go comment
Fix doc comment to indicate that cache expiry default duration is 0.
* feat: use TaskTest for executor tests
* feat: more tests
* feat: separate tests for executing and formatting with new functional options that work for both test types
* feat: formatter tests
* refactor: more tests
* refactor: executor functional options
* refactor: minor tidy up of list code
* fix: WithVersionCheck missing from call to NewExecutor
* feat: docstrings for structs with functional options
* refactor: prefix the functional options with the name of the struct they belong to
