Document pre-defined macros and additional constants

Return a non-zero exit code if processor fails

Update docs with 3.1.0 directives

Upgrade to .NET 8

Add checks for additional numeric literal syntax error edge cases

Fix typo in Debugger.cs

Add `1.1.1` to versions list in docs

Reduce ambiguity in documentation over characters

Add version parameter

Fix issue with reading debug files with empty sections