R52

[Diggers]
• Internal engine CVar access changes. CVar id's are now built-in Variable classes.
• Add French book language (https://github.com/Mhatxotic/Diggers/issues/3).
• Compact some English pages reducing the number of book pages.
• Add cvar 'gam_lang' which takes a two letter language. Setting an unsupported code selects 'English'. Example: "fr" forces French language.

[Assets]
• Fix section titles in readme.

R51

[Diggers]
• Set default POINT filtering.
• Fix check for control modifier in key bindings. An incorrect comparison was resolved.

[Assets]
• Touch up some readme text. Update compatibility statements.
• Update Ubuntu versions.
• Signal compatibility with Linux Mint 22.1.