[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

config/config.exs

@@ -12,7 +12,9 @@ config :pinchflat,
   generators: [timestamp_type: :utc_datetime],
   # Specifying backend data here makes mocking and local testing SUPER easy
   yt_dlp_executable: System.find_executable("yt-dlp"),
+  apprise_executable: System.find_executable("apprise"),
   yt_dlp_runner: Pinchflat.YtDlp.CommandRunner,
+  apprise_runner: Pinchflat.Notifications.CommandRunner,
   media_directory: "/downloads",
   # The user may or may not store metadata for their needs, but the app will always store its copy
   metadata_directory: "/config/metadata",

config/test.exs

@@ -3,6 +3,7 @@ import Config
 config :pinchflat,
   # Specifying backend data here makes mocking and local testing SUPER easy
   yt_dlp_executable: Path.join([File.cwd!(), "/test/support/scripts/yt-dlp-mocks/repeater.sh"]),
+  apprise_executable: Path.join([File.cwd!(), "/test/support/scripts/yt-dlp-mocks/repeater.sh"]),
   media_directory: Path.join([System.tmp_dir!(), "test", "media"]),
   metadata_directory: Path.join([System.tmp_dir!(), "test", "metadata"]),
   tmpfile_directory: Path.join([System.tmp_dir!(), "test", "tmpfiles"]),