[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/components/layouts/partials/sidebar.html.heex

@@ -24,6 +24,7 @@
             <.sidebar_item icon="hero-home" text="Home" href={~p"/"} />
             <.sidebar_item icon="hero-tv" text="Sources" href={~p"/sources"} />
             <.sidebar_item icon="hero-adjustments-vertical" text="Media Profiles" href={~p"/media_profiles"} />
+            <.sidebar_item icon="hero-cog-6-tooth" text="Settings" href={~p"/settings"} />
           </ul>
         </div>
       </nav>
@@ -38,12 +39,7 @@
           target="_blank"
           href="https://github.com/kieraneglin/pinchflat/wiki"
         />
-        <.sidebar_item
-          icon="hero-code-bracket"
-          text="Github"
-          target="_blank"
-          href="https://github.com/kieraneglin/pinchflat"
-        />
+        <.sidebar_item icon="hero-cog" text="Github" target="_blank" href="https://github.com/kieraneglin/pinchflat" />
         <li>
           <span
             class={[