In order to block focusing a text message whenever an @mention of a user is pressed, we need to introduce a piece of state called `userProfileBottomSheetActive` to the markdown context provider. We need to block focusing a text message, because otherwise this will block the navigation to the user profile, which is not what we want
This is step 3 in the list below
Outlined below are the steps I will take to make @metion of a user into a touchable
1. Introduce `createMemberMapForUserMentions` function (Right now we only store a set of usernames but we also will want to know the id of the user based on the username)
2. Introduce `parseUserMentions` function (We will use this function to get and return a userID from the `membersMap`)
3. Introduce `userProfileBottomSheetActive` state to the markdown context (This will be used for disabling the press to focus on a message functionality)
4. Introduce `MarkdownUserMention` component (this will render the touchable that will navigate to the user profile)
Depends on D9392