Support type `number` to args

[onmax]

Describe the feature

Description

Allow users to add a type number to the args. Citty will automatically parse the number and thrown an error if the string is invalid

Example

export default defineCommand({
  meta: {
    name: "Test",
    description: "A test command",
  },
  args: {
    len: {
      type: "number",
      description: "Limit len",
      default: 15
    },
  },
  run({ args }) {
  	args.len // Type "number"
  },
});

Related to

This issue can be related to #87

Feedback

Is this a good feature we would like to add?

Additional information

• Would you be willing to help implement this feature?

### Tasks

[janniks]

This seems to be working (tested on latest main playground example)

[Barbapapazes]

related to #73, #23 and #71

No release since the PR has been merged.

[Barbapapazes]

This seems to be working (tested on latest main playground example)

Indeed, it works now (but not released yet).