v0.7.0

Breaking changes

• AST :type and :kind values are now snake_case atoms instead of strings.
  "ImportDeclaration" → :import_declaration, "const" → :const, etc.
  Migration: update all pattern matches from %{type: "ImportDeclaration"} to %{type: :import_declaration}.
• All error tuples now return {:error, [%{message: String.t()}]} consistently.
  Previously transform, minify, imports, and bundle returned {:error, [String.t()]}.
• Bang functions (parse!, transform!, minify!, bundle!, etc.) now raise OXC.Error instead of RuntimeError.
  The exception has an :errors field with the structured error list.

Added

• OXC.collect_imports/2 — analyze imports with type info (:static/:dynamic), kind (:import/:export/:export_all), and byte offsets. Powered by a Rust NIF using OXC's visitor pattern.
• OXC.rewrite_specifiers/3 — rewrite import/export specifiers in a single pass without Elixir-side AST walking.
• :preamble option for bundle/2 — inject code at the top of the IIFE function body.
• :treeshake option for bundle/2 — enable tree-shaking (default: false).
• walk/2, postwalk/2, postwalk/3 now accept a list of nodes at the root level.
• OXC.Error exception module.

Changed

• collect/2 uses a recursive accumulator instead of creating an ETS table per call.
• to_snake_atom uses Macro.underscore/1 instead of hand-rolled regex.
• ImportInfo uses #[derive(NifMap)] instead of a manual Encoder impl.
• @type ast tightened to %{required(:type) => atom(), optional(atom()) => any()}.
• patch_string/2 deduplication behavior is now documented.
• Rust NIF split from a single 800-line lib.rs into parse.rs, imports.rs, bundle.rs, options.rs, error.rs.
• Import collector rewritten with oxc_ast_visit::Visit trait (~50 lines) replacing a hand-rolled 250-line AST walker.
• Bundle chunk selection no longer falls through to arbitrary chunks.