typescript: add ApiRouteSchema, ApiSettingsSchema

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create and export

• ApiRouteSchema used to define settings.routes
• ApiSettingsSchema used to define api service's settings
  I can't remember all of them T__T
  

api.service settings

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@icebob https://github.com/moleculerjs/moleculer-web/blob/master/src/alias.js#L63
seem only accept 1 action

aliases: {
  'POST /login': [
    'user.mustExists', // will be overwritten
    'user.passwordCompare',
  ]
}

[icebob]

@icebob https://github.com/moleculerjs/moleculer-web/blob/master/src/alias.js#L63
seem only accept 1 action

Yeah, you are right, it has only one action.

[icebob]

@shawnmcknight could you review it again, plz?

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hope you can merge this

[icebob]

I would like to wait for an approval from @shawnmcknight

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Please merge before it outdated again

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@shawnmcknight @icebob