Basic onboading flow (#24)

* removed unused file

* [WIP] Created onboarding form

* Finished basic onboarding flow; added tests

* Improved onboarding language

lib/pinchflat_web/controllers/media_sources/source_html/new.html.heex

@@ -1,5 +1,5 @@
 <div class="mb-6 flex gap-3 flex-row items-center">
-  <.link navigate={~p"/sources"}>
+  <.link :if={!Plug.Conn.get_session(@conn, :onboarding)} navigate={~p"/sources"}>
     <.icon name="hero-arrow-left" class="w-10 h-10 hover:dark:text-white" />
   </.link>
   <h2 class="text-title-md2 font-bold text-black dark:text-white ml-4">New Source</h2>

lib/pinchflat_web/controllers/media_sources/source_html/source_form.html.heex

@@ -3,9 +3,9 @@
     Oops, something went wrong! Please check the errors below.
   </.error>
 
-  <.input field={f[:original_url]} type="text" label="Source URL" help="URL of a channel or playlist (required)" />
+  <.input field={f[:friendly_name]} type="text" label="Custom Name" />
 
-  <.input field={f[:friendly_name]} type="text" label="Friendly Name" />
+  <.input field={f[:original_url]} type="text" label="Source URL" help="URL of a channel or playlist (required)" />
 
   <.input
     field={f[:media_profile_id]}
@@ -21,14 +21,14 @@
     options={friendly_index_frequencies()}
     type="select"
     label="Index Frequency"
-    help="Roughly how often to check for media to download"
+    help="The time between one index of this source finishing and the next one starting"
   />
 
   <.input
     field={f[:download_media]}
     type="toggle"
     label="Download Media?"
-    help="Unchecking still indexes media but it won't be downloaded"
+    help="Unchecking still indexes media but it won't be downloaded until you enable this option"
   />
 
   <:actions>