Add more languages to DetectLanguage()

[grainme]

Description

DetectLanguage() only recognizes some languages but not all that we support (OCaml, Zig, C#, etc.).

Problem

For unsupported languages, it returns "UNKNOWN".

Solution

Add missing language patterns to the switch statement following the existing pattern.

Additional Context

• Consider whether we should use case-insensitive comparisons
• Should we handle version suffixes (e.g., python3, python3.9)?
• Do we even need this function, or shall we leave this task to the user?