[Feature]: Change the keyboard API to return Promise<this>

[trajano]

🚀 Feature Request

Presently the keyboard operations return Promise<void>. Can it be modified to return Promise<this> or Promise<Keyboard> so we can do something like a chain if we wanted

Example

This is from my post in https://stackoverflow.com/questions/78777386/how-do-i-avoid-then-or-repeated-await-when-chaining-promises-in-typescript but due to the limitations of typescript my concept would be

await page.keyboard.type("username")
  .then((k)=>k.press("Tab"))
  .then((k)=>k.type("password"))
  .then((k)=>k.press("Tab"))

Motivation

It's just to avoid too much repeated code and allow better visualization of how certain groups code code would work together. That is to avoid

await page.keyboard.type("username");
await page.keyboard.press("Tab"));
await page.keyboard.type("password");
await page.keyboard.press("Tab"));

[pavelfeldman]

Chained APIs are discouraged in our API model.

[trajano]

OK FWIW https://stackoverflow.com/a/78777606/242042 shows how it could be done. It's nice to be able to write tests like this

    await myPage
      .type(programName)
      .tab()
      .type(shortName)
      .tab()
      .type(description)
      .tab()
      .type(fee)
      .enter();

Also I would only want it on keyboard anyway not the whole thing.