[Enhancement] Allow manual indexing/downloading (#162)

* Added controller actions and UI for forcing index and download actions

* Added forcing of downloads for media items

lib/pinchflat_web/controllers/sources/source_html/actions_dropdown.html.heex

@@ -0,0 +1,55 @@
+<.button_dropdown text="Actions" class="justify-center w-full sm:w-50">
+  <:option>
+    <span
+      x-data="{ copied: false }"
+      x-on:click={"
+                window.copyTextToClipboard('#{rss_feed_url(@conn, @source)}')
+                copied = true
+                setTimeout(() => copied = false, 4000)
+              "}
+    >
+      Copy RSS Feed
+      <span x-show="copied" x-transition.duration.150ms><.icon name="hero-check" class="ml-2 h-4 w-4" /></span>
+    </span>
+  </:option>
+  <:option :if={@source.download_media}>
+    <.link
+      href={~p"/sources/#{@source}/force_download"}
+      method="post"
+      data-confirm="Are you sure you want to force a download of all *pending* media items? This isn't normally needed."
+    >
+      Force Download
+    </.link>
+  </:option>
+  <:option>
+    <.link
+      href={~p"/sources/#{@source}/force_index"}
+      method="post"
+      data-confirm="Are you sure you want to force an index of this source? This isn't normally needed."
+    >
+      Force Index
+    </.link>
+  </:option>
+  <:option>
+    <div class="h-px w-full bg-bodydark2"></div>
+  </:option>
+  <:option>
+    <.link
+      href={~p"/sources/#{@source}"}
+      method="delete"
+      data-confirm="Are you sure you want to delete this source (leaving files in place)? This cannot be undone."
+    >
+      Delete Source
+    </.link>
+  </:option>
+  <:option>
+    <.link
+      href={~p"/sources/#{@source}?delete_files=true"}
+      method="delete"
+      data-confirm="Are you sure you want to delete this source and it's files on disk? This cannot be undone."
+      class="mt-5 md:mt-0"
+    >
+      Delete Source + Files
+    </.link>
+  </:option>
+</.button_dropdown>