[Paid] [$500] [Mentions v2] Update the SuggestionMention to show the auto-complete widget when trying to mention a room

[rlinoz]

When trying to mention a room we want to display the auto-complete widget with the matching reports when the mention is happening in a report that belongs to a policy.

• The room mention starts with #
• The auto-complete widget will show only rooms that belong to the same policy that the mention is happening and that includes what is being typed
• If a mention starts in a room that doesn't belong to a policy we won't show the auto-complete widget

Details can be found here in the Mentions V2 design doc.

[melvin-bot]

Triggered auto assignment to @strepanier03 (NewFeature), see https://stackoverflowteams.com/c/expensify/questions/14418#:~:text=BugZero%20process%20steps%20for%20feature%20requests for more details.

[melvin-bot]

⚠️ It looks like this issue is labelled as a New Feature but not tied to any GitHub Project. Keep in mind that all new features should be tied to GitHub Projects in order to properly track external CAP software time ⚠️

[robertKozik]

Hi! Can you assign me to this issue?

[rlinoz]

@robertKozik do you have an ETA for this one?

[robertKozik]

I think I'm half way done already. I think tomorrow I'll finish the implementation and prepare the PR