v0.2.9-beta.1

Pre-release (beta)

Fixed

• CSV export column order: to_csv no longer sorts columns alphabetically. Insertion order preserved via IndexMap.
• append() losing string columns: get_string() now handles Categorical columns.
• Plugin resolution on Windows: HOME falls back to USERPROFILE. Searches executable directory. HAYASHI_PATH uses ; on Windows.

Added

• ++ and -- increment/decrement operators
• for i, v in list and for k, v in dict bindings
• try/catch/finally with finally block
• hay install with version, hay list shows versions
• match as contextual keyword
• list_files() builtin
• Interpreter decomposition (~4800 → ~680 lines)
• English-only user-facing output

Not published to crates.io. Binary-only pre-release for testing.