[w3c/clipboard-apis] Add method `match` (`clipboard.match(regex)`) to check clipboard for pattern matching before reading - as it is done in iOS (Issue #199)

Hi!
The clipboard is a powerful thing and it can be used to predict user actions - as it is already used in mobile devices.

## Idea
In order for the user's data to be safe, you need to ask permission before reading. 
But before asking, we could check the contents for the presence of a pattern - at the same time, we do not receive data, but only information(`true/false`) about whether the contents of the clipboard correspond to our pattern. This is already available in native [mobile apps](https://developer.apple.com/documentation/uikit/uipasteboard#3671022). 

## Suggestion
I suggest thinking about implementing this behavior in browsers. This will allow us to process such cases, for example - a user logged in to the Internet banking website with a phone number in the clipboard - we can immediately offer to make a money transfer to this number, saving the user time

```
Promise<boolean> match(RegExp reg);
```

## Usage examples
This will allow us to process such cases, for example - a user logged in to the website with a phone number in the clipboard - we can immediately offer to make a money transfer to this number, saving the user time

```
    const phoneNumberReg = ^(\([0-9]{3}\)|[0-9]{3}-)[0-9]{3}-[0-9]{4}$;

    // ask only if necessary
    navigator.clipboard.match(phoneNumberReg).then(
        (res) => if(res) {
            return navigator.clipboard.readText();
    },
  );

```

### Native Apps and Web Apps
Let's close the feature gap!

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