feat: Dashboard component added

[KiranRajeev-KV]

PR: Dashboard Component

Summary

This PR adds a new Dashboard component featuring:

• 4 statistics cards
• 1 bar graph showing the average number of event attendees per month
• A table displaying the 6 most recent events

To Do

• Change the color of the chart
• Enhance the appearance of the growth stats
• Remove growth stats for the "All Time" filter

[IAmRiteshKoushik]

Hi @KiranRajeev-KV. PR looks good to me. A couple of minor fixes to roll-out after the merge:

1. Change the order {This Year, Last Year, All Time}
2. A button to the Recent Events component which can allow a navigation to the Events page. (will open an issue for this and wait till the Events page is merged)
3. Date format changes : DD/MM/YYYY -> DD, <Month-Name (4-letters)>, YY
4. Logos for the stats can be shifted to right side instead of being on the left. Would probably look professional. Let me know your thoughts on this one ? (not very certain about it)
5. Removal of the Theme Toggle button. Would add that as part of the Sidebar shortly and make it a global state.

Good work. Merged!