[Enhancement] Allow configuration of media container format (#383)

* Adds media container to media_profiles and updates option builder

* Added media container to media profile form

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

@@ -12,7 +12,7 @@
 
   <section x-data="{ mediaProfileId: null }">
     <section class="flex justify-between items-center mt-4">
-      <h3 class=" text-2xl text-black dark:text-white">
+      <h3 class="text-2xl text-white">
         General Options
       </h3>
       <span class="cursor-pointer hover:underline" x-on:click="advancedMode = !advancedMode">