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/actions/admin/matches/create.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module EuchreCamp
+  module Actions
+    module Admin
+      module Matches
+        class Create < EuchreCamp::Action
+          include Deps[repo: 'repositories.matches']
+
+          def handle(request, response)
+            match_params = request.params.to_h
+            match_params[:played_at] = Time.parse(match_params[:played_at]) if match_params[:played_at]
+
+            # Create the match
+            match = repo.create(match_params)
+
+            # Enqueue background job to calculate Elo
+            EuchreCamp::Jobs::CalculateEloJob.perform_later(match[:id])
+
+            response.redirect_to("/admin/matches")
+          rescue StandardError => e
+            # Handle validation errors or other issues
+            puts "Error: #{e.message}"
+            puts e.backtrace.join("\n")
+            response.redirect_to("/admin/matches/new")
+          end
+        end
+      end
+    end
+  end
+end