[Core feature] [flytekit] pyflyte run should support executing tasks

[kumare3]

Motivation: Why do you think this is important?

Flyte allows executing one task at a time.
Pyflyte run does not support this.

For example in a workflow

from flytekit import workflow, task
from typing import List, Dict

@task
def t1(l: str) -> List[str]:
    return [l]


@workflow
def wf(l: str = "") -> List[str]:
    return t1(l=l)


@task
def t2(i: Dict[str, int]) -> Dict[str, int]:
    return i

@workflow
def wf2m(i: Dict[str, int]) -> Dict[str, int]:
    return t2(i=i)

Goal: What should the final outcome look like, ideally?

It should be possible to

pyflyte run --remote test2.py t1 --l hello

and help should show

➜ pyflyte run test2.py --help

Usage: pyflyte run test2.py [OPTIONS] COMMAND [ARGS]...

  Run a [workflow|task] in a file using script mode

Options:
  --help  Show this message and exit.

Commands:
  wf    Run test2.wf in script mode
  wf2m  Run test2.wf2m in script mode
  t1    Run test2.t1 in script mode
  t2    Run test2.t2 in script mode

Describe alternatives you've considered

Jupyter notebook

Propose: Link/Inline OR Additional context

No response

Are you sure this issue hasn't been raised already?

• Yes

Have you read the Code of Conduct?

• Yes