Double-click on a message for like/heart

### Your use case

#### What would you like to do?
If I wanna like/add heart to a message, I have to hold and then choose it. It's be more effortless and enjoyable to double-click to attach/react with a default emoji. Similarly like facebook and other platforms have.

#### Why would you like to do it?

1. Faster
2. Better UX, satisfaction
3. Less typos/misclicks

#### How would you like to achieve it?

1. I assume this might be a very low hanging fruit for the programmers. No need to provide users with a functionality of choosing default emojies of implementing smth new. I'm not familiar with the codebase, but from my experience, I assume this would be a 1 story point straightforward effort.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_

### Are you willing to provide a PR?

No

The issue names no repository files, tests, or client entry point. First locate message-reaction handling in the relevant Element client and clarify the default emoji and client scope; done means double-clicking a message adds the agreed reaction without breaking the existing hold-to-react flow.

Written by the indexing model from the issue text.