Expose Arrow C Data ABI structs in libduckdb-sys#778
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Define dependency-free ArrowArray and ArrowSchema layouts for DuckDB's Arrow conversion APIs, and block bindgen's opaque forward-declared versions so generated bindings use the concrete crate-local structs.
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Define dependency-free
ArrowArrayandArrowSchemalayouts for DuckDB's Arrow conversion APIs, and block bindgen's opaque forward-declared versions so generated bindings use the concrete crate-local structs.Lets downstream crates call DuckDB's new Arrow C APIs without redefining
ArrowArray/ArrowSchemaor depending on arrow-rs. Prepares duckdb-rs to adopt the new Arrow conversion APIs later.