v0.5.0

Added

• Prolog language layer by @foxyseta in #84
• Idris language layer by @foxyseta in #83
• Rainbow layer by @foxyseta in #82
• Typst (Tree-sitter) grammar by @foxyseta in #76

Documentation

• Expanded contributing guidelines by @foxyseta in #78

Internal

• New API for language layers by @foxyseta in #81