User story

As a frequent transit rider, I want to search for my favorite stops and routes, so that I can quickly get to the information I need

New Acceptance Criteria

[x] Add a new boolean value in the .env file for whether search is supported - search only works on OBA servers >= 2.2.2. https://developer.onebusaway.org/api/where/search
[x] If search is disabled, nothing in the UI changes
[x] If search is enabled, a search box is displayed in the navigation bar next to the logo
[x] invoking search (by pressing return or enter) should cause a SearchResults component to appear within a ModalPane component.
[x] A new OBA REST API proxy called routes/api/oba/search will be created that issues two API calls: one to the Stop Search API and one to the [Route Search API[(https://developer.onebusaway.org/api/where/search/route). It returns the results of both API calls in a structure that resembles the following: {routeSearchResults, stopSearchResults}
[x] The search results component should issue an API request to the routes/api/oba/search API and display the results as two lists in the SearchResults component: Stops and Routes.
[x] Clicking a Stop will center the map on the selected stop and open the StopPane with the expected results.
[x] Clicking a Route will display: alert("TODO: show route ${routeID}");