enhancement: Add skeletons and loaders in all components which rely on data from server

[IAmRiteshKoushik]

Requirements

• [ ] Add skeletons in Dashboard (table, stats, chart)
• [ ] Add skeletons in EventsPage (table)
• [ ] Add skeletons in BlogsPage (table)
• [ ] Add skeletons in CampaignsPage (table)
• [ ] Add skeletons in SuggestionsPage (table)

This is a long term issue and it would be amended and edited till the release of v1.