Add historical Thoresen games in the TCEC games archive

[skiminki]

TCEC originally stood for Thoresen Chess Engines Competition. The web server has the following old tournament PGNs from 2010 from the Thoresen times:

• https://tcec-chess.com/archive/json/TCEC_Tournament_1.pgn
• https://tcec-chess.com/archive/json/TCEC_Tournament_2.pgn
• https://tcec-chess.com/archive/json/TCEC_Tournament_3.pgn
• https://tcec-chess.com/archive/json/TCEC_Tournament_4.pgn
• https://tcec-chess.com/archive/json/TCEC_Tournament_5.pgn
• https://tcec-chess.com/archive/json/TCEC_Match_1.pgn
• https://tcec-chess.com/archive/json/TCEC_Match_2.pgn
• https://tcec-chess.com/archive/json/TCEC_Match_3.pgn
• https://tcec-chess.com/archive/json/TCEC_Match_4.pgn
• https://tcec-chess.com/archive/json/TCEC_Match_5.pgn
• https://tcec-chess.com/archive/json/TCEC_Match_6.pgn

It would be nice to add these in the TCEC games database for historical record. Since the archive organizes everything by seasons, I'm thinking about adding these as "Season 0" games.

These PGNs have a different way of marking book moves to any TCEC proper PGN. This means that some Python changes are needed in https://github.com/TCEC-Chess/tcecgames/blob/06a2b204a20eace584dbcaa950b7658cf0fe4875/scripts/compactifypgn.py to find the book exits.

[skiminki]

The source material is missing book exits for:

• tournament 1 second to last game, missing engine evals (WAR'd)
• tournament 4 all games

Tournament 1 has 8-move book exits for almost all games (except one: round 1.3 last game uses 6 moves exit). So, I made a workaround (WAR) in compactifypgn based on an educated guess that the game missing engine evals also used 8 moves book exit.