Add the Endgame delimiter into Analysis

Feature request: Add the Endgame delimiter into Analysis.
Now there is summary statistic for the trinity Opening/Middlegame/Endgame,
so you are certain how to split game moves.
Moreover, I see over moves a name of the opening, for example 'Scotch Game: ....'
I assume that is the last move of the Opening and transition to the Middlegame.
Since you are certain where is transition to the Endgame, please mark it by "Endgame"
At initial implementation it could be a static title, in advanced version it could be something like "Rookie endgame"
So game should be look
1. e2 e4
....
5. Qxd4 Qf6
Scotch Game
6. Qxf6 ....
......
Rookie Endgame <===== HERE
40. Rb1 Rg7
...
 PS. Please use :tup reaction to vote for such feature