[Enhancement] Add Apprise support (#170)

* [WIP] add settings sidebar entry and placeholder page

* [WIP] added placeholder UI and logic for settings form

* Added column and UI for apprise server

* Add some tests

* Added placeholder command runner for apprise

* [WIP] Adding apprise package

* Added apprise command runner

* Hooked up apprise notification module

* Ensured apprise was running in verbose mode

* Updated wording of apprise notification

* Added apprise to README

lib/pinchflat_web/controllers/settings/setting_html.ex

@@ -0,0 +1,20 @@
+defmodule PinchflatWeb.Settings.SettingHTML do
+  use PinchflatWeb, :html
+
+  embed_templates "setting_html/*"
+
+  @doc """
+  Renders a setting form.
+  """
+  attr :changeset, Ecto.Changeset, required: true
+  attr :action, :string, required: true
+
+  def setting_form(assigns)
+
+  def apprise_server_help do
+    url = "https://github.com/caronc/apprise/wiki/URLBasics"
+    classes = "underline decoration-bodydark decoration-1 hover:decoration-white"
+
+    ~s(Server endpoint for Apprise notifications when new media is found. See <a href="#{url}" class="#{classes}" target="_blank">Apprise docs</a> for more information)
+  end
+end