feat(players): add origin competition/team model and filtering

templates/players/index.html

@@ -42,6 +42,8 @@
       <div><label for="id_competition">Competition</label>{{ search_form.competition }}</div>
       <div><label for="id_team">Team</label>{{ search_form.team }}</div>
       <div><label for="id_season">Season</label>{{ search_form.season }}</div>
+      <div><label for="id_origin_competition">Origin competition</label>{{ search_form.origin_competition }}</div>
+      <div><label for="id_origin_team">Origin team</label>{{ search_form.origin_team }}</div>
     </div>
 
     <details>