add new --url like flag on action get to show both .json and naked url for webactions

Is your feature request related to a problem? Please describe.

When a web action is created, it can be invoked in two ways. One with a URI that adds a .json extension and without. The latter only works if the action actually returns a responses that conforms to the HTTP schema (e.g., has a body, status code and headers). If the body is missing when the latter URI is is used, the HTTP response is 204 No Content. This can be confusing for developers.

Rather than change the behavior of action get --url which currently return the naked URI (no .json), I think it would be better to add a new flag to list both URI. WDYT?

Describe the solution you'd like

> ... action get foo --url-all
The URL to invoke this web action is:
https://example.com/api/v1/web/namespace/package/foo.json

Or use this URL if your action result conforms to the HTTP web action schema:
https://example.com/api/v1/web/namespace/package/foo

Describe alternatives you've considered
An alternative is for --url to accept an optional value --url all.
What are some better flag names?

从 action get 命令开始，跟踪其现有的 --url 选项如何格式化 web action URI。查看该命令的 CLI 测试（如果有），并确定新选项应如何同时显示 .json URL 和不带扩展名的 URL。完成的标准是：在不改变现有 --url 行为的情况下，实现所选 flag 和输出，并覆盖这两种 URL。