Feature to copy own Matrix ID string

### Steps to reproduce

1. start screen with a logged-in account and an overview of chats
2. tap on the own profile picture in the upper left to open settings
3. tap on the first entry, which contains the own username and shows the Matrix ID like @username:example.org
4. the Matrix ID is now visible as plain text, but it is not possible to copy it

### Outcome

#### What did you expect?
I would like to be able to easily copy my own Matrix ID so I can share it via some other channel without typing the whole ID manually

#### What happened instead?
nothing, I did not find a way to copy the Matrix ID string into the clipboard

### Your phone model

_No response_

### Operating system version

_No response_

### Application version and app store

_No response_

### Homeserver

_No response_

### Will you send logs?

No

### Are you willing to provide a PR?

No