[VMS] Set-up UI for non-profits filtering page

[PC98]

• If you look at the Figma designs for the non-profits tab (you will have to be on the "Non-profits" Figma page), the filtering UI is very similar to what we built for events.
• The goal of this task is to replicate certain UI component, particularly, EventsPageUnfiltered.tsx, EventsPageWithSidebar.tsx, EventsPageLayout.tsx and EventsPageSidebarComponent.tsx for the non-profits page.
• Follow a similar directory structure and naming convention as we have for events. Since we are not fetching data yet, the prop types for certain components can be empty. You can also just render null for the main content UI.
• Ensure that the sidebar component has the "Filter" text, the "CLEAR" button functionality, location auto-complete, and the causes filter. The URL should also update as expected when a filter is selected. You don't have to build the "supporters" filter.
• Try to re-use as much of our existing code, and create new shared components as necessary.