DraftVersion base model and very basic admin pages

spec/models/legislation/draft_version_spec.rb

@@ -0,0 +1,9 @@
+require 'rails_helper'
+
+RSpec.describe Legislation::DraftVersion, type: :model do
+    let(:legislation_draft_version) { build(:legislation_draft_version) }
+
+  it "should be valid" do
+    expect(legislation_draft_version).to be_valid
+  end
+end