Add Elo rating system with match entry and CSV upload

- Implement EloCalculator service for 2v2 Euchre matches
- Create background job processing with GoodJob
- Add single match entry form
- Add CSV upload for batch match entry
- Create player rankings view
- Add database schema for matches and elo snapshots

app/views/admin/matches/index.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module EuchreCamp
+  module Views
+    module Admin
+      module Matches
+        class Index < EuchreCamp::View
+          expose :matches
+        end
+      end
+    end
+  end
+end

app/views/admin/matches/new.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module EuchreCamp
+  module Views
+    module Admin
+      module Matches
+        class New < EuchreCamp::View
+          expose :players
+        end
+      end
+    end
+  end
+end

app/views/admin/matches/upload.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module EuchreCamp
+  module Views
+    module Admin
+      module Matches
+        class Upload < EuchreCamp::View
+        end
+      end
+    end
+  end
+end

app/views/players/rankings.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module EuchreCamp
+  module Views
+    module Players
+      class Rankings < EuchreCamp::View
+        expose :players
+      end
+    end
+  end
+end