Pull Request Overview

This PR updates the Zig physics library to support a new batch body adding API and modernizes I/O handling. The changes introduce a three-phase body addition system (Prepare/Finalize/Abort) for better performance when adding multiple bodies at once, and update the library to use newer Zig I/O APIs.

• Adds new batch body operations:AddBodiesAbort,AddBodiesFinalize, andAddBodiesPrepare
• Updates I/O handling from deprecatedAnyWriter/AnyReader APIs to modernstd.Io.Writer/std.Io.Reader
• Modernizes ArrayList initialization patterns and argument ordering
• Updates minimum Zig version requirement to 0.15.1

Reviewed Changes

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