feat: Add SCP: Secret Laboratory protocol support

[Fluffy41]

Contribution Details:

• Implemented a new protocol for SCP: Secret Laboratory in protocols/scpsl.py.
• Updated games.csv to include SCP: Secret Laboratory entry.
• Modified main.py to handle additional query parameters for SCP: Secret Laboratory servers.
• Added the line 'from .scpsl import SCP_SL' to protocols/init.py.

Changes:

• discordgsm/games.csv: 1 addition
• discordgsm/main.py: 1 addition
• discordgsm/protocols/init.py: 1 addition
• discordgsm/protocols/scpsl.py: 42 additions

Note: I am not a professional developer, and this contribution might have limitations. I've noticed a demand for SCP: Secret Laboratory support in Discord GSM and attempted to implement it based on community interest. Feedback and assistance from experienced developers are highly appreciated.

[BattlefieldDuck]

Thank you for the implementation! Your coding skills are great!