💡Adding mailto protocol to link in case of email

I thought this would be good. Currently I type in the protocol manually, though I believe it would be simple to achieve like this:

`inline-tool-link.ts - line: 364`
```js
/**
* We need to add missed HTTP protocol to the link, but skip 2 cases:
* 1) Internal links like "/general"
* 2) Anchors looks like "#results"
* 3) Protocol-relative URLs like "//google.com"
* 4) Strip the query string (if any) and check if email address
*/
const isInternal = /^\/[^/\s]/.test(link),
isAnchor = link.substring(0, 1) === '#',
isProtocolRelative = /^\/\/[^/\s]/.test(link),
isMail = link.split('?')[0].includes('@');

if (!isInternal && !isAnchor && !isProtocolRelative) {
link = isMail ? 'mailto:' + link : 'http://' + link;
}
```

I tried to fork for a PR, but for some reason, I keep getting errors trying to run the `yarn build:dev` command. Thought I would just share the idea, and have someone more experienced add it later on if liked.