[Insights] [Release 0] Add Top Spenders default report

[puneetlath]

Part of the Insights project

Main issue: https://github.com/Expensify/Expensify/issues/570577
Doc section: https://docs.google.com/document/d/1zMWsgWBXY5Lx4V1M8LVTovOaTX-q34LempKIKWH8rwI/edit?tab=t.0#heading=h.mvmf31h2iib
Project:

Feature Description

Add a new default report called Top Spenders to the Reports page.

In order to do this, we will:

1. Add a new section to the Reports page LHN called Insights that lives above explore
   a. This section will only be shown when there is at least one Insights report to display
2. Within the Insights section add a Top Spenders report
   a. The report should only be shown if the user is an admin, auditor, or approver on a workspace
   b. The query for this report is type:expense group-by:from date:last-month sort-by:groupTotal sort-order:desc

When there is nothing to display, we'll use the same empty state as Reports > Expenses

Issue Owner

Current Issue Owner: @

[melvin-bot]

Triggered auto assignment to Contributor-plus team member for initial proposal review - @mananjadhav (External)

[melvin-bot]

Triggered auto assignment to @jliexpensify (NewFeature), see https://stackoverflowteams.com/c/expensify/questions/14418#:~:text=BugZero%20process%20steps%20for%20feature%20requests for more details. Please add this Feature request to a GH project, as outlined in the SO. Remember to draft any necessary HelpDot updates by following the instructions here.

[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 ⚠️

[melvin-bot]

Auto-assign attempt failed, all eligible assignees are OOO.