Switch to sqlite (#22)

* Updated project to use sqlite

* Edited migrations directly because I fear no man

* Updated search functions and tests to work with sqlite

* Updated build tools to remove postgres

priv/repo/migrations/20240129015810_create_media_metadata.exs

@@ -3,13 +3,12 @@ defmodule Pinchflat.Repo.Migrations.CreateMediaMetadata do
 
   def change do
     create table(:media_metadata) do
-      add :client_response, :jsonb, null: false
+      add :client_response, :json, null: false
       add :media_item_id, references(:media_items, on_delete: :delete_all), null: false
 
       timestamps(type: :utc_datetime)
     end
 
     create unique_index(:media_metadata, [:media_item_id])
-    create index(:media_metadata, [:client_response], using: :gin)
   end
 end