Delete media items (#20)

* Added method for deleting media files and their content

* Adds controllers and methods for deleting media and files

* Improved tmpfile setup and teardown for tests

* Actually got tmpfile cleanup running once per suite run

* Finally fixed flash messages

lib/pinchflat_web/controllers/searches/search_html/show.html.heex

@@ -16,7 +16,10 @@
             <.highlight_search_terms text={result.matching_search_term} />
           </:col>
           <:col :let={result} label="" class="flex place-content-evenly">
-            <.link navigate={~p"/media/#{result.id}"} class="hover:text-secondary duration-200 ease-in-out mx-0.5">
+            <.link
+              navigate={~p"/sources/#{result.source_id}/media/#{result.id}"}
+              class="hover:text-secondary duration-200 ease-in-out mx-0.5"
+            >
               <.icon name="hero-eye" />
             </.link>
           </:col>