v0.1.0

Added

• Expected<T> / Result<T> result type with Unexpected for explicit error construction
• Failure with ring-buffer frame trace, configurable via ANYHOW_MAX_FRAMES
• fail(msg, domain) and fail_with(payload, msg, domain) for typed payloads
• Failure::downcast<T>(), Failure::is<T>(), Failure::chain(), Failure::root_cause()
• Expected<T>::context(msg) / with_context(fn) for wrapping errors with human-readable layers
• ANYHOW_TRY, ANYHOW_TRY_ASSIGN, ANYHOW_TRY_CATCH for error propagation with call-site capture
• ANYHOW_BAIL, ANYHOW_ENSURE for early return
• ANYHOW_SHORT_MACROS opt-in aliases: TRY, TRY_ASSIGN, TRY_CATCH, BAIL, ENSURE
• ScopeGuard with move support and release()
• CMake anyhow::anyhow target via FetchContent or find_package