ADD conflicts file for pull api

app/models/gitea/pull.rb

@@ -0,0 +1,11 @@
+class Gitea::Pull < Gitea::Base
+  self.inheritance_column = nil # FIX  The single-table inheritance mechanism failed
+  # establish_connection :gitea_db
+  
+  self.table_name = "pull_request"
+
+  serialize :conflicted_files, Array
+
+  belongs_to :pull_request, class_name: '::PullRequest', foreign_key: :id, primary_key: :gpid, optional: true
+
+end