Adds TF2_SetClientTeam to provide symmetry to TF2_GetClientTeam

Also remove some trailing whitespace

plugins/include/tf2_stocks.inc

@@ -330,6 +330,19 @@ stock TFTeam:TF2_GetClientTeam(client)
 	return TFTeam:GetClientTeam(client);
 }
 
+/**
+ * Sets a client's current team.
+ *
+ * @param client        Client index.
+ * @param team          TFTeam team symbol.
+ * @noreturn
+ * @error               Invalid client index.
+ */
+stock TFTeam:TF2_SetClientTeam(client, team)
+{
+    ChangeClientTeam(client, _:team);
+}
+
 /**
  * Gets a client's current class.
  *